Q1 a) Convex mirror b) Convave mirror c) Concave mirror (?) Q2 ) f = r/2 therefore r = f×2 and the r= 10× 2 = 20 cm. Q3) A plane mirror is a flat surface which reflects the image clearly. A Concave mirror is an inverted image of original object and also it is a magnified image. A Convex mirror is a mirror in which basically we can se many things fitted in the image obtained or objects get divereged into the mirror.. thanks alott for such a good explaination it made the chapter so easy to understand...👍👍
Q1 (a) convex (b) concave (c) concave Q2 given, f=10cm R = 2f = 2 x 10 = 20cm Radius R = 20 cm. Q3 Without touching the mirror, we still can identify the type of that mirror. We can identify them just by merely standing in front of it. If the image is of same height and upright it might be a plane mirror. If the image is inverted and when moved closer the image is highly magnified, it is a concave mirror. If the image formed is diminished, it is a convex mirror. We can also identify them by looking at the mirror whether it is flat, bulged or curved inwards. I thank Manocha academy to teach topics in the simplest way and making study more fun to learn ! I thank you so much ..
Q.1 a)convex mirror b)plane mirror c)concave mirror Q.2 Given: f-10cm f=R/2 10=R/2 10×2=R R=20cm Q.3 plane mirror: plane mirror has a flat surface and parallel beam of light will reflect in parallel. Concave mirror: Concave mirror is a spherical surface and reflection will be converge. Convex mirror: Convex mirror is also a spherical surface the reflection will be diverge.
But the answer b is concave because it is diverging ray ex of put a paper and parallely distance tilted downward when the sun rays meet the magnifying glass the rays meet at one point so the paper burns
Q1 (A) convex mirror (B) concave (C) concave Q2)Focal lengths is 10 cm then f=r/2 r=f*2 => r=10*2 => r=20cm Q3) by seeing the image formed in the different mirrors can distinguish the types of mirror without touching the surface of the mirrors Thank you 😌
Answers: (Qs 1) (a) convex (b) concave (c) concave (Qs 2) f = R/2 f × 2 =R R= 10 × 2 R= 20 cm (Qs 3) We can distinguish b/w them by standing in front of the mirrors or placing an object in front of then so that we distinguish b/w them by the images formed on the mirrors. Btw the lesson was really good it helped a lot .. Thankyou sir💜👍🏻💯
1 ) a ) Convex mirrors are used in shop security mirrors. b) Concave mirrors are used in solar furnace c) A concave mirror is used by dentists to examine teeth. 2) The radius of curvature is exactly twice the focal length so the answer is 20cm . 3) If you look into a plane mirror, you can find that the size of the image is same as that of the object. If you look into a concave mirror, you can see an enlarged image when placed close and can see an inverted image when kept away. A convex mirror always forms a small and erect image.
These are the answers for the top 3 questions sir ! THANK YOU I AM A KID WHO IS DOING OLYMPIAD SO I HAVE TO LEARN THESE LESSONS !! thank you so much sir ... your vidoes are great sir ! DO YOU HAVE ANY QUIZES FROM THIS LESSON SIR ??😀😀
Q1 A. Convex B. Concave C. Convex Q2 Radius of curvature is 20cm because the focal length is equal to half of the radius of curvature Q3 In the plane mirror the size of the image on mirror is equal to size of the object In the concave mirror the size of the image is greater than size of the image In the convex mirror the the size of the image is smaller than the size of the object So we find the type of mirror without touching him
a) convex: as it cover large area b)concave:rays are converged to focal point C)concave : to focus on exact area 2: F=R/2 10=R/2 R=20 3: Plane mirror:forms actual image Concave: image is inverse and magnified Convex: image is diminished and smaller size Thank u sir.....👏
1 a) convex mirror b) concave mirror c) concave mirror 2 20 cm 3 plane mirror will show same height image. concave mirror will show inverted Image and when brought closer will be magnified. convex mirror will show the objects small.
The Top Three Questions: 1.a) Convex Mirror 1.b) 1.c) Concave Mirror 2) The radius of curvature will be the double of the focal length i.e. 10x2 cm = 20 cm. 3) We can distinguish between a plane mirror, concave mirror and convex mirror by looking into each of them. The plane mirror will give us an image of the same height, while the concave mirror will give an inverted image and when looked closer, it will become straight and magnified. In the convex mirror, the image will be shorter and diminished, no matter the distance between the object and the mirror. (Sir, I have a doubt in the 1st question, number 'b' as I don't know the type of mirror used in a solar furnace and its purpose. This is my one and only doubt. Other than this, I have no doubt or problems and my concept is clear.) Thanks, Shreyansh Dutta.
1(a) convex mirror (b) concave mirror (c) concave mirrir 2 ) 20cm 3 ) plane mirror : has a flat surface and same hight concave mirror : it is the only mirror wich are inverted or magnified convex mirror : smaller and always upright and diminished sir please tell me if this is correct or wrong
Preparing for competitive exams but this portion of physics was always too difficult for me But you made it very easy, now I can understand the concept Thanks a lot sir❤️
1)(a) convex mirror (b) plane mirror (c) concave mirror 2)Focal length=r/2 10=r/2 10×2=r r=20 3)Plane mirror: The surface is flat, the beam of light is parallel and forms upright image of same size Concave mirror: The surface is curved inwards, the beams of light converge at a point and forms inverted image or magnified and upright image Convex mirror: The surface is curved outwards, the beams of light divergence from a point and forms upright and diminished image
Sir Q1. a) convex mirror b) concave mirror c) concave mirror Q2)20cm Q3)Plane mirror will give image of same shape and height. Convex mirror will give diminished and upright image. Concave mirror will give inverted and magnified image.
Super! All your answers are correct :) Also try the Quiz for this video on my Website. Quiz button is below the video: www.manochaacademy.com/physics/light/l/concave-and-convex-mirrors
Top 3 questions : 1 - A) Convex Mirror B) Concave Mirror C) Concave Mirror 2 - Since F = R/2, R = F x 2 = 10 x 2 = 20 3 - A plain mirror will show a upright and normal image, a concave mirror will show an inverted or if you go close a magnified image, a convex mirror will show a small but upright image.
1. A. Convex B. Concave C. Concave 2. R=2f So, R = 2*10=20cm 3. Plane: if the image formed is of the same size of the object. Concave : if the image formed is magnified or image of the object is enlarged. Convex : if the size of the image is less than the object.
Q1.ans.(a) concave (b) plane mirror (c) convex Q2.ans. radius of curvature= f/2 Here,f= 10 So,10/2= 5 cm Q3.ans. if image is in same size of ours then it is plane mirror. If image formed is inverted and magnified then it is concave mirror If image formed is diminished then it is convex mirror. Thank you sir for clearing my all confusion between concave and convex mirror. 😌😄
(Question first`s B part) "Concave mirror is used in the solar furnace because concave mirrors are the only type of mirror that reflects light toward a single focal point".
Shop security mirror is convex. Dentists use concave mirror by bringing it near our teeth for magnification. We distinguish a plane mirror by noticing that no changes occurs and we can distinguish a concave mirror by inverted image (far) and magnified (near) and we can distinguish a convex mirror by an short image. I hope that the answers will be correct😏
Q1. (a) convex mirror (b) concave mirror (c) concave mirror Q2. If focal length is 10 cm. f=R/2, then R=f×2 R=10×2 R=20cm Q3. A plane mirror reflects the same height, image. A concave mirror reflections converge forming an inverted image when the object is afar and enlarged, upright if object is near. A convex mirror reflections diverge forming a diminished or reduced image of the object.
Answers below- 1) a)Convex(because the image formed in the shop security mirror is diminished) b)Concave (because the image formed in the solar furnace is magnified) c) Concave (because the image formed in the mirror by dentists is magnified) 2)We know that focul=radius/2. So if focal length is 10 cm the radius of curvature will be focal x 2. So 10 x2 will be 20 cm.And that’s the answer. 3)Plane mirror is a flat surface which reflects light .Also the body will be of the same height and erect. Concave mirror is curved surface which reflects light.The image will be magnified and inverted. Convex mirror is a surface which reflects light and is curved outwards.The image is diminished. Hope this helps. P.S- Would love to have a like
QUESTIONS ANSWERS (12:51) 1.a) Concave b) Convex c) Concave 2. Focal length = r/2 R = focal length × 2 Focal length = 10cm R = 10 × 2 = 20cm 3. By putting a torch a bit far away from the mirror. If the mirror is flat and the torch is seen on the other side of the mirror, then it is a plane mirror. If a curved mirror projects an upside image of the torch, then it is a concave mirror. If the curved mirror projects an erect image of the torch, then it is a conver mirror.
3.By Determining the Focus of the mirror. If the focus is behind the mirror, the mirror is a convex mirror. If the focus is in front the mirror, the mirror is a concave mirror.
Anvidplayzz you are completly wrong for the first question except sub division c) The mirrors used for solar furnaces are concave and for shopkeeping mirrors it is convex(as you need a greater view)
1a)convex b)plane c)concave 2 20cm 3 plane mirrors form an upright image of same size convex mirrors form an upright yet diminished image concave mirrors form an inverted image from afar and a magnified and upright image from nearby
a ) shop security mirror is a convex mirror as it provide greater view of the surroundings. b) for a solar furnace a concave mirror is used as it is a converging lens and converges the sun's rays to a particular point. A lot of heat is provided to that particular point where the food is cooked. c) dentists use a concave mirror as it is a converging mirror and creates a magnified image thus helping the dentist to properly see the teeth.
Q1- (a). Convex mirror (b). Concave mirror (c). Concave mirrors Q2- Focal length= half radius of curvature of mirror. So, radius of curvature is 20cm. Q3- Plane- Same size as in real world Concave- magnified close Convex- Covers large area, wide image
Q1 a. Convex mirror is used in shop security mirror so as to give a wide view b. Plane mirror is used in solar furnace c. Concave mirror is used be dentist to examine teeth because of its magnification Q2 If f = 10cm, R = f×2 = 10 × 2 = 20cm Q3. Plane mirror - The image will be the same as the object - the image will be at the same distance as the object - the image will be erect and virtual Concave mirror - The image will be inverted at first but when move closer, it will be magnified Convex mirror - The image will be smaller than the object - it gives a wide view of image
1 a. Convex mirror b. Concave mirror c. Concave mirror 2. f=r/2 10=r/2 10×2=r r=20 3. There are two ways you can distinguish between plane, Concave and convex mirrors- •plane mirror - the reflective surface is flat concave mirror - the reflective surface is curved inwards convex mirror- the reflective surface is curved outwards OR •plane mirror- when an object is held in front of it, the image appears to be the same size concave mirror- when an object is held in front of it, the image appears to be inverted. If the object is held very close to the surface of the mirror, the image appears to be magnified. convex mirror - if an object is held in front of it, the image appears to be diminished.
1) ans: a)convex mirror b) concave mirror c) concave mirror 2)ans : f= R/2 so , radius of curvature will 20 3) ans : plain mirror= appears same high or object Convex mirror= diverging mirror Concave mirror= converging mirror
Sir my answers are 1) a) convex mirror b) concave mirror c) concave mirror 2) If f= R/2 then R = f×2 = 10× 2 = 20 cm 3) Plane mirror = parallel rays remain parallel Convex = diverging mirror Concave = converging mirror
hello debo can you clear my dought my question is convex mirror main focus toh hota he nahi aur uss focus ko ham bana the ha mirror ke andar aur centre of curvature kasa andar ho sakta ha convex mirror ke?? pls tell
@@ranarajputana8021 Since Convex mirror is a diverging mirror, it is not possible for all incidence rays to form a Focus Point. so, we do assume the focus on the back of the mirror. That's why we call it virtual focus. Hope it helps.
Q1. (a) convex mirror (b) concave mirror (c) concave mirror Q2. f=10 f=R/2 then R=2(f) R=20 Q3. by just looking at the mirror for example: plane mirror have plane surface , concave mirror have curved inner surface and convex mirror have curved outer surface.
1. 1). CONVEX 2). CONCAVE 3). CONCAVE 2. ) focal length = radius/2 10 = r/2 r = 2×10 r = 20 Therefore The Radius is 20 3. ) We can distinguish them by the way they look or the way they give out the image
1.Convex.2,plane.3.concave 2.if FP(f)=10 cm FP(r)×2=20cm 3.Plane mirror has a flat surface.Concave mirror has an inner curved surface and convex has an outer curved surface. Thank you very much for letting me know this topic
*Note* : *👉In Concave mirror image is inverted, diminished in two cases only* 1. *Object at infinity distance* 2. *object at beyond center of curvature* 👉 *If object is placed at center of curvature then image is inverted and "Same size as the object size"* *👉If object is placed between C & F and Object is at F then the image is inverted, enlarged or magnified*
1-a convex. b concave. c concave. 2- Focal length - Radius/2 So, Radius - focal length .2 10 multiply by 2 So 20 cm. 3- plane mirror is flat. Concave mirror is curved inwards and has shiny surface. Convex mirror is curved outwards.
Excellent, i have read at many places, but never i got the concept as clear as it is here.. great.. Please keep on going and make the concepts simple.. it would help lot of learners
Q-1 a) convex mirror as it gives a wide field of view.... b) concave mirror as it is a converging mirror and it will bring all lights concentrated at a point.. c) concave mirror as it gives magnified image of teeth. Q-2 R=2f R=2(10)=20 cm Q-3..... We can see our image in those mirror and can observe the following points : in plane mirror our image will be as same size as we are...... In concave mirror our image will be inverted or magnified..... In convex mirror our image will be diminished
Answer of 1=A. Convex B. Convex C. Concave 2. The radius 20. 3. Plane mirror have flat surface Concave mirror have magnified images Convex mirrors have short images
1 .( A )convex mirror because we can see a wider view of the area (B) convex mirror because it converges the rays of light into 1 single point making the area hotter . (C ) concave mirror because it enlarged the image of the teeth 2.if f=R/2 then R = f × 2 R = 10×2 = 20 cm 3. In a plane mirror the image is of the same size as that of the object and the image is erect . In a concave mirror the image looks inverted when far away from the mirror and magnified when near the mirror . In a convex mirror the object appears diminished helping us to see a wider view of the area .
3 ans If you look into a plane mirror, you can find that the size of the image is same as that of the object. If you look into a concave mirror, you can see an enlarged image when placed close and can see an inverted image when kept away. A convex mirror always forms a small and erect image.
Q1. (a)convex mirror (b)concave mirror (c)concave mirror Q2. As we know that focal length is the half of radius and radius is double of focal length so radius is equal to double of focus Radius= 2*focal length R=2*10cm =20cm So the radius is 20cm 1 Q3.By standing in front of all the three •If the image is exactly equal to person or the substance. •If we go close to a concave mirror it becomes mangnified and if the distance is increased then it forms magnified and virtual image. •It will always form virtual image ,it will form an upright image if you are near the focus..
thanks sir me ye chapter 2 month se pad rhi thi pr concave and convex ke dout clear nhi ho rhe the but aapki is video se mere sare dout clear ho gye h🥰🥰🥰😇😇😇😇😇😇😇😇😇😇😇😇😇😇😇😇😇😇😇😇😇😇😇😇😇😇😇😇😇😇😇😇
First question = a.) Convex mirror b.)i am not sure but concave mirror c.) Convex mirror Second question = given focal length = 10cm so since radius =f/2 to gind f use f=radius×2. f=10cm×2=20cm Third question= plane mirrors show us the same hight like the real object and the image is upright Concave mirrors they can show as inverted and magnified images when we get close it gets magnified and when we get far from it it gets inverted Convet mirrors they cover larger area for as to see and the rays are demnished Thanks sir now i have an improved understanding about mirrors correct me if i am mistaken in my answers 🖒 Thanks
1. a. Convex mirror b. Concave mirror c. Concave mirror 2. 20 cm 3. When we place an object in front of a plane mirror it is of the same height. In front of a concave mirror , it appears inverted. In front of a convex mirror it looks small and diminished.
Our online classes have started and I didn't understand anything based on these. But when my friend share this link to me I just watched it simply. But now I am so encouraged and interested to study all these. Thank you so much sir.... For presenting all these in an easy manner☺️❤️
@@ManochaAcademy Hello dear sir, I have a question. I don't have a double sided mirror at home. But is the front side of a double sided mirror concave and its opposite a convex? Or its front a plane mirror while its opposite side a concave?
Q 1. a) Convex Mirror . b) Concave Mirror . c) Concave Mirror . Q 2. Radius of curvature is 20 cm as :- f = R/2 2f = R 2*10 = R 20 = R Q 3. We can distinguish the mirrors by their reflection or by their shape . Thank you 🙏
helo bhai can you clear my dought my question is convex mirror main focus toh hota he nahi aur uss focus ko ham bana the ha mirror ke andar aur centre of curvature kasa andar ho sakta ha convex mirror ke?? pls tell bro
@@ranarajputana8021 See Bro As we know that convex mirror is a diverging mirror so the light Ray which falls on the reflecting surface of convex mirror get diverged and will not meet together that’s why we stretch the light rays backward means behind the mirror so that the light rays can meet.... Focus is formed behind the mirror because when light rays which are parallel will pass through focus and the light rays will diverg and we will not get the focus from the original light rays to get the focus we will stretch the light ray backward so as to get the focus of the mirror.. Same case is for Centre of Curvature Thank you
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Q1
a) Convex mirror
b) Convave mirror
c) Concave mirror (?)
Q2 ) f = r/2 therefore r = f×2 and the r= 10× 2 = 20 cm.
Q3) A plane mirror is a flat surface which reflects the image clearly.
A Concave mirror is an inverted image of original object and also it is a magnified image.
A Convex mirror is a mirror in which basically we can se many things fitted in the image obtained or objects get divereged into the mirror.. thanks alott for such a good explaination it made the chapter so easy to understand...👍👍
Legends are here 1 day before exam 🤣😅😅😅😅😅
Correct
Nope
Good
Yes
Yes tomorrow is my exam
Q1
(a) convex
(b) concave
(c) concave
Q2
given,
f=10cm
R = 2f
= 2 x 10
= 20cm
Radius R = 20 cm.
Q3
Without touching the mirror, we still can identify the type of that mirror. We can identify them just by merely standing in front of it. If the image is of same height and upright it might be a plane mirror. If the image is inverted and when moved closer the image is highly magnified, it is a concave mirror. If the image formed is diminished, it is a convex mirror. We can also identify them by looking at the mirror whether it is flat, bulged or curved inwards.
I thank Manocha academy to teach topics in the simplest way and making study more fun to learn ! I thank you so much ..
Hatsoff to you sir. I learner in byjus,vedantu,aakash and even unacedemy. But your physics is the best. God bless you.
Hey where do u leave😄😊
Hat yaar chikna acha nhi padhata h
Gadha h
@@pcmumar6475 ye bekar nhi padate tera dimag free fire khelete khelte gobar br gya h
😏😏kuch samajh me aata h iski video se bade aae free fire wale bhat
He explains better than school teachers and has a thinking of student struggles so he talks as if he is our friend .
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If u say so but as to me no one will replace my physical trs
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Yes
Agree
Q.1 a)convex mirror
b)plane mirror
c)concave mirror
Q.2 Given: f-10cm
f=R/2
10=R/2
10×2=R
R=20cm
Q.3 plane mirror: plane mirror has a flat surface and parallel beam of light will reflect in parallel.
Concave mirror: Concave mirror is a spherical surface and reflection will be converge.
Convex mirror: Convex mirror is also a spherical surface the reflection will be diverge.
But the answer b is concave because it is diverging ray ex of put a paper and parallely distance tilted downward when the sun rays meet the magnifying glass the rays meet at one point so the paper burns
Q1
(A) convex mirror
(B) concave
(C) concave
Q2)Focal lengths is 10 cm then
f=r/2
r=f*2 => r=10*2 => r=20cm
Q3) by seeing the image formed in the different mirrors can distinguish the types of mirror without touching the surface of the mirrors
Thank you 😌
Hu
Q
Good 👍
Intelligent 🤭😔
Wow!! Very intelligent; right answers👍👌✔
you explain everything in a easy manner and also in a practical ways sit god may bless you with 100 million subs on youtube
Yes I am satisfied with you
Op thought
Achha mazak hai
Yup your indian
I reckon with you
Answers:
(Qs 1)
(a) convex
(b) concave
(c) concave
(Qs 2)
f = R/2
f × 2 =R
R= 10 × 2
R= 20 cm
(Qs 3)
We can distinguish b/w them by standing in front of the mirrors or placing an object in front of then so that we distinguish b/w them by the images formed on the mirrors.
Btw the lesson was really good it helped a lot .. Thankyou sir💜👍🏻💯
Anybody else watching in July 2024😂😂
Me
Me
I dey watch some for July 😊
Me .....
No! In 2025
EVERY STUDENT WANTS PHYSICS SIR LIKE YOU😀😀
Wow Thanks
1 ) a ) Convex mirrors are used in shop security mirrors. b) Concave mirrors are used in solar furnace c) A concave mirror is used by dentists to examine teeth. 2) The radius of curvature is exactly twice the focal length so the answer is 20cm . 3) If you look into a plane mirror, you can find that the size of the image is same as that of the object. If you look into a concave mirror, you can see an enlarged image when placed close and can see an inverted image when kept away. A convex mirror always forms a small and erect image.
These are the answers for the top 3 questions sir ! THANK YOU I AM A KID WHO IS DOING OLYMPIAD SO I HAVE TO LEARN THESE LESSONS !! thank you so much sir ... your vidoes are great sir ! DO YOU HAVE ANY QUIZES FROM THIS LESSON SIR ??😀😀
Hi
keep it up!!!
No.1 youtube channel for education with practical examples..thank you so much sir🙏🏻
It's my pleasure
Q1
A. Convex
B. Concave
C. Convex
Q2
Radius of curvature is 20cm because the focal length is equal to half of the radius of curvature
Q3
In the plane mirror the size of the image on mirror is equal to size of the object
In the concave mirror the size of the image is greater than size of the image
In the convex mirror the the size of the image is smaller than the size of the object
So we find the type of mirror without touching him
Lol you have helped me a lot a day before exam memorising the concept....Thank you sir!!!
Glad to hear that
@@ManochaAcademy Really?
Same here....I have my exam tomorrow
Sir thank you. You didnt cut the spherical ball. It was a cadboury gems box which you opened
Dude same here 😏
I am from somalia I watched this video me and my classmates when prepared final exam 2019-2020 -keep going teacher
Keep watching
Where is Somalia, guy reply me
Mana Telugu vallu anta manchi chustunnaru
@@RakeshKumar-en9vt somalia is east africa are you known?
@@saadaqabdirahmansalaad2640 thank you i needed that answer for my home work
Sir i never comment on any type of video on youtube.. But your way of teaching is mind blowing.. I love your way of teaching.. And gain knowledge.. 💕💕
It's my pleasure
He explains better than school teachers and has thought of student struggles so he talks as if he is our friend and explains so good.
Thanks sir.
I searched out for many videos of lenses but I now think that why didn't I watched your video first? awesome video 👏👏👏
It's true
I have no words to explain your teaching Style 👌
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He
never understood mirrors this easily. Thank you for sharing sir!
You are most welcome
Dude this is the best thing I've watched and actually understood from 😭 Thank you so much 😭💘
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@@mohamedmamdouh3172 exams tomorrow?
Super video sir you explain is very good it is better than our school teachers
6:06 it's a Cadbury's gems ball 😅😂 amazing prop for demonstration!!!!!
sir did not even cut it , it is the opening part of the gems ball
Yes, right 😊
Lol
True🤭🤭
@@arunkumarm9718 obviously omg
Excellent explanation sir I see many videos before but i didn't understand when I saw your video i understand clearly🎉
a) convex: as it cover large area
b)concave:rays are converged to focal point
C)concave : to focus on exact area
2: F=R/2
10=R/2
R=20
3:
Plane mirror:forms actual image
Concave: image is inverse and magnified
Convex: image is diminished and smaller size
Thank u sir.....👏
2: R=20
All concept cleared....every school want a teacher like u....
1 a) convex mirror
b) concave mirror
c) concave mirror
2 20 cm
3 plane mirror will show same height image.
concave mirror will show inverted Image and when brought closer will be magnified.
convex mirror will show the objects small.
Who watching this vidio in december 2024. 😅 but sir you explained very well 😊
The Top Three Questions:
1.a) Convex Mirror
1.b)
1.c) Concave Mirror
2) The radius of curvature will be the double of the focal length i.e. 10x2 cm = 20 cm.
3) We can distinguish between a plane mirror, concave mirror and convex mirror by looking into each of them. The plane mirror will give us an image of the same height, while the concave mirror will give an inverted image and when looked closer, it will become straight and magnified. In the convex mirror, the image will be shorter and diminished, no matter the distance between the object and the mirror.
(Sir, I have a doubt in the 1st question, number 'b' as I don't know the type of mirror used in a solar furnace and its purpose. This is my one and only doubt. Other than this, I have no doubt or problems and my concept is clear.)
Thanks,
Shreyansh Dutta.
1 b) concave mirror (കോൺ കേവ് )
@@moinuonline can you feel me why a concave mirror is used in a solar
1(a) convex mirror
(b) concave mirror
(c) concave mirrir
2 ) 20cm
3 ) plane mirror : has a flat surface and same hight
concave mirror : it is the only mirror wich are inverted or magnified
convex mirror : smaller and always upright and diminished
sir please tell me if this is correct or wrong
All correct 💯💯💯
op bolte
Preparing for competitive exams but this portion of physics was always too difficult for me
But you made it very easy, now I can understand the concept
Thanks a lot sir❤️
1)(a) convex mirror
(b) plane mirror
(c) concave mirror
2)Focal length=r/2
10=r/2
10×2=r
r=20
3)Plane mirror: The surface is flat, the beam of light is parallel and forms upright image of same size
Concave mirror: The surface is curved inwards, the beams of light converge at a point and forms inverted image or magnified and upright image
Convex mirror: The surface is curved outwards, the beams of light divergence from a point and forms upright and diminished image
Sir Q1. a) convex mirror
b) concave mirror
c) concave mirror
Q2)20cm
Q3)Plane mirror will give image of same shape and height.
Convex mirror will give diminished and upright image.
Concave mirror will give inverted and magnified image.
Super! All your answers are correct :) Also try the Quiz for this video on my Website. Quiz button is below the video: www.manochaacademy.com/physics/light/l/concave-and-convex-mirrors
Top 3 questions :
1 - A) Convex Mirror
B) Concave Mirror
C) Concave Mirror
2 - Since F = R/2, R = F x 2 = 10 x 2 = 20
3 - A plain mirror will show a upright and normal image, a concave mirror will show an inverted or if you go close a magnified image, a convex mirror will show a small but upright image.
Your answers are right because it's match with me 😁🤣
@@anushkabartwal9462 and your answers are right because i want😗.
Wow 😮 man what a class on mirror !! Thank you 🙏 Sir
The concept is totally clear to me now ❤️
Glad to hear that
@@ManochaAcademy realy
@@bhavanarathod298 no
😒😒
A.convex
B..concave
C.concave
2.20cm
3.by looking at shape
Q1. a. convex mirror
b. concave mirror
c. concave mirror
Q2. 20cm
Q3. Plane mirror - Flat surface
concave mirror - curved inwards
convex mirror - curved outwards
1. Convex Mirror , b. Convex Mirror , C. Concave Mirror
2. F= 2R = 10×2 =20
3. In Plane mirror rays will remain parallel . In convex mirror rays diverges . In concave mirror rays converges.
Thanks sir it helps alot 👍
Tomorrow is my physics exam, and when this topic was taught in online classes I muted it and played game. But sir, you helped me a lot, Thankyou Sir.
Most welcome
Ff
Abe dhyan dena chahiye tha na sala game ki dukan
@@surendrarajput9609 🤣
Q1-a)convex
b)concave
c)concave
Q2- 20cm
Q3-By observing the reflection of each mirror
Great lesson I enjoyed while also learning
Sir your way of teaching is great👍
Thanks for liking
1.
A. Convex
B. Concave
C. Concave
2. R=2f
So, R = 2*10=20cm
3. Plane: if the image formed is of the same size of the object.
Concave : if the image formed is magnified or image of the object is enlarged.
Convex : if the size of the image is less than the object.
Q1.ans.(a) concave
(b) plane mirror
(c) convex
Q2.ans. radius of curvature= f/2
Here,f= 10
So,10/2= 5 cm
Q3.ans. if image is in same size of ours then it is plane mirror.
If image formed is inverted and magnified then it is concave mirror
If image formed is diminished then it is convex mirror.
Thank you sir for clearing my all confusion between concave and convex mirror. 😌😄
(Question first`s B part) "Concave mirror is used in the solar furnace because concave mirrors are the only type of mirror that reflects light toward a single focal point".
20 cm will be the right answer
Shop security mirror is convex.
Dentists use concave mirror by bringing it near our teeth for magnification.
We distinguish a plane mirror by noticing that no changes occurs and we can distinguish a concave mirror by inverted image (far) and magnified (near) and we can distinguish a convex mirror by an short image.
I hope that the answers will be correct😏
Brilliant way of teaching
Thanks
@@ManochaAcademy welcome
Tell me all the questions
Very nice yes you say right brilliant way of teaching
Your explanation is very clear and perfect . we understood very clear.
Thank you sir
You are most welcome
Q1.
(a) convex mirror
(b) concave mirror
(c) concave mirror
Q2. If focal length is 10 cm.
f=R/2, then R=f×2
R=10×2
R=20cm
Q3.
A plane mirror reflects the same height, image.
A concave mirror reflections converge forming an inverted image when the object is afar and enlarged, upright if object is near.
A convex mirror reflections diverge forming a diminished or reduced image of the object.
Solar furnanc isn't plane mirror
It's gonna be concave as it converge all the light rays to specific point called the focus which can later be converted into solar energy
ok, tnx for informing me
Answers below-
1)
a)Convex(because the image formed in the shop security mirror is diminished)
b)Concave (because the image formed in the solar furnace is magnified)
c) Concave (because the image formed in the mirror by dentists is magnified)
2)We know that focul=radius/2.
So if focal length is 10 cm the radius of curvature will be focal x 2.
So 10 x2 will be 20 cm.And that’s the answer.
3)Plane mirror is a flat surface which reflects light .Also the body will be of the same height and erect.
Concave mirror is curved surface which reflects light.The image will be magnified and inverted.
Convex mirror is a surface which reflects light and is curved outwards.The image is diminished.
Hope this helps.
P.S- Would love to have a like
Excellent thaku I was serching for answers
awsome....I my self a teacher but never saw such a great explanation
Who is here because of online class ?
We are
Twins , because black images
Me
Me
Mee!
Me
1.concave mirror
2.20cm
3.flat mirror gives same height,
Concave mirror gives magnified image when very closely and inverted image from distance,
Convex mirror gives diminished image
QUESTIONS ANSWERS (12:51)
1.a) Concave
b) Convex
c) Concave
2. Focal length = r/2
R = focal length × 2
Focal length = 10cm
R = 10 × 2
= 20cm
3. By putting a torch a bit far away from the mirror.
If the mirror is flat and the torch is seen on the other side of the mirror, then it is a plane mirror.
If a curved mirror projects an upside image of the torch, then it is a concave mirror.
If the curved mirror projects an erect image of the torch, then it is a conver mirror.
bro this is so wrong
except the question 2
3.By Determining the Focus of the mirror.
If the focus is behind the mirror, the mirror is a convex mirror.
If the focus is in front the mirror, the mirror is a concave mirror.
@@Etsuuuko how?
Anvidplayzz you are completly wrong for the first question except sub division c) The mirrors used for solar furnaces are concave and for shopkeeping mirrors it is convex(as you need a greater view)
1a)convex
b)plane
c)concave
2 20cm
3 plane mirrors form an upright image of same size
convex mirrors form an upright yet diminished image
concave mirrors form an inverted image from afar and a magnified and upright image from nearby
a ) shop security mirror is a convex mirror as it provide greater view of the surroundings. b) for a solar furnace a concave mirror is used as it is a converging lens and converges the sun's rays to a particular point. A lot of heat is provided to that particular point where the food is cooked. c) dentists use a concave mirror as it is a converging mirror and creates a magnified image thus helping the dentist to properly see the teeth.
Q1- (a). Convex mirror
(b). Concave mirror
(c). Concave mirrors
Q2- Focal length= half radius of curvature of mirror.
So, radius of curvature is 20cm.
Q3- Plane- Same size as in real world
Concave- magnified close
Convex- Covers large area, wide image
Q1
a. Convex mirror is used in shop security mirror so as to give a wide view
b. Plane mirror is used in solar furnace
c. Concave mirror is used be dentist to examine teeth because of its magnification
Q2
If f = 10cm, R = f×2 = 10 × 2 = 20cm
Q3.
Plane mirror
- The image will be the same as the object
- the image will be at the same distance as the object
- the image will be erect and virtual
Concave mirror
- The image will be inverted at first but when move closer, it will be magnified
Convex mirror
- The image will be smaller than the object
- it gives a wide view of image
Really nice explanation sir....... 👌👌👌 I never watch a class like this with practical knowledge.....u make the subject easier....thanks a lot sir.....
Thanks and welcome
1 a. Convex mirror
b. Concave mirror
c. Concave mirror
2. f=r/2
10=r/2
10×2=r
r=20
3. There are two ways you can distinguish between plane, Concave and convex mirrors-
•plane mirror - the reflective surface is flat
concave mirror - the reflective surface is curved inwards
convex mirror- the reflective surface is curved outwards
OR
•plane mirror- when an object is held in front of it, the image appears to be the same size
concave mirror- when an object is held in front of it, the image appears to be inverted. If the object is held very close to the surface of the mirror, the image appears to be magnified.
convex mirror - if an object is held in front of it, the image appears to be diminished.
Thanks a lot sir
You are making future of this country
Best teacher i had listened to
Thank you!! Great to hear that you liked the video!! Do share it with your friends and family :)
1) ans: a)convex mirror b) concave mirror c) concave mirror
2)ans : f= R/2 so , radius of curvature will 20
3) ans : plain mirror= appears same high or object
Convex mirror= diverging mirror
Concave mirror= converging mirror
The best teacher I found on youtube...
Sir my answers are 1) a) convex mirror
b) concave mirror
c) concave mirror
2) If f= R/2 then R = f×2 = 10× 2 = 20 cm
3) Plane mirror = parallel rays remain parallel
Convex = diverging mirror
Concave = converging mirror
Yes sahana you are right 👍💯
1.a) Convex Mirror
b) Concave Mirror
c) Concave Mirror
2. We F=r/2
Therefore, 10cm=r/2
r=10cm*2
=20cm
3.→Plane Mirrors have Flat Surface.
→Concave Mirrors are curved Inwards.
→Convex Mirrors are curved Outwards.
😒😒
hello debo can you clear my dought
my question is convex mirror main focus toh hota he nahi aur uss focus ko ham bana the ha mirror ke andar aur centre of curvature kasa andar ho sakta ha convex mirror ke?? pls tell
@@ranarajputana8021 Since Convex mirror is a diverging mirror, it is not possible for all incidence rays to form a Focus Point. so, we do assume the focus on the back of the mirror. That's why we call it virtual focus. Hope it helps.
@@RaviNayak_ thnx bro🤗💯
Q1. (a) convex mirror
(b) concave mirror
(c) concave mirror
Q2. f=10
f=R/2 then R=2(f)
R=20
Q3. by just looking at the mirror
for example: plane mirror have plane surface , concave mirror have curved inner surface and convex mirror have curved outer surface.
No-one can do better visual explanation 🤓as you do Sir😍
Thanks a ton
@@ManochaAcademy we are very lucky to have a friend-like teacher like you 🙏😍🥰
@@ManochaAcademy we are very lucky to have a friend-like teacher like you 🙏😍🥰
this was soo easy to understand , i didn't understand anything when i read it from my textbook, thanxx soo much ^-^
1. 1). CONVEX
2). CONCAVE
3). CONCAVE
2. ) focal length = radius/2
10 = r/2
r = 2×10
r = 20
Therefore The Radius is 20
3. ) We can distinguish them by the way they look or the way they give out the image
1.Convex.2,plane.3.concave
2.if FP(f)=10 cm
FP(r)×2=20cm
3.Plane mirror has a flat surface.Concave mirror has an inner curved surface and convex has an outer curved surface.
Thank you very much for letting me know this topic
ur 1st main 2nd is is wrong solar furnace is concave but still kudos for gving it a shot 👏👏
Sir, i must say u are amazing......ur videoes are easy to understand.....looking for more videoes....👍😊
Thanks a lot :) Do check out more Videos, Quiz and Top 3 Questions on my website: www.manochaacademy.com
The best class on this particular topic ❤️🙏🏼
Thanks for liking
Seriously you put a lot efforts for us.
.
.
.
.
Thank you dear!
Thanks :) Do share the video with your friends and family!
Tqsir
*Note* :
*👉In Concave mirror image is inverted, diminished in two cases only*
1. *Object at infinity distance*
2. *object at beyond center of curvature*
👉 *If object is placed at center of curvature then image is inverted and "Same size as the object size"*
*👉If object is placed between C & F and Object is at F then the image is inverted, enlarged or magnified*
Very nice explanation 👍👍👍
Thanks for liking
A good video for beginner like me . thank u I really enjoyed the basics of optics chapter.
Glad it was helpful!
1-a convex.
b concave.
c concave.
2- Focal length - Radius/2
So, Radius - focal length .2
10 multiply by 2
So 20 cm.
3- plane mirror is flat.
Concave mirror is curved inwards and has shiny surface.
Convex mirror is curved outwards.
Excellent, i have read at many places, but never i got the concept as clear as it is here.. great.. Please keep on going and make the concepts simple.. it would help lot of learners
I don't believe that you are a great sir.......I see your all videos and got good marks...... Thank you so much😊😊❤❤ sir...
All the best
Q-1 a) convex mirror as it gives a wide field of view....
b) concave mirror as it is a converging mirror and it will bring all lights concentrated at a point..
c) concave mirror as it gives magnified image of teeth.
Q-2 R=2f
R=2(10)=20 cm
Q-3..... We can see our image in those mirror and can observe the following points : in plane mirror our image will be as same size as we are...... In concave mirror our image will be inverted or magnified..... In convex mirror our image will be diminished
Answer of 1=A. Convex
B. Convex
C. Concave
2. The radius 20.
3. Plane mirror have flat surface
Concave mirror have magnified images
Convex mirrors have short images
1)a convex
b concave
c concave
2) 20
3)plane mirror
-erect image
- same size as object
Concave
- inverted
- magnified
Convex
- smaller
- upright
Great explanation sir,teachers like you are highly needed in education system
true
Thanks a ton
Better than online class and teacher
Thanks for liking
1 .( A )convex mirror because we can see a wider view of the area
(B) convex mirror because it converges the rays of light into 1 single point making the area hotter .
(C ) concave mirror because it enlarged the image of the teeth
2.if f=R/2 then
R = f × 2
R = 10×2 = 20 cm
3. In a plane mirror the image is of the same size as that of the object and the image is erect .
In a concave mirror the image looks inverted when far away from the mirror and magnified when near the mirror .
In a convex mirror the object appears diminished helping us to see a wider view of the area .
Your video has Been displayed in our classroom by our teacher we all really enjoyed and understood the concept really well ❤
3 ans If you look into a plane mirror, you can find that the size of the image is same as that of the object.
If you look into a concave mirror, you can see an enlarged image when placed close and can see an inverted image when kept away.
A convex mirror always forms a small and erect image.
With your teaching I understand a lot
Q1. (a)convex mirror
(b)concave mirror
(c)concave mirror
Q2. As we know that focal length is the half of radius and radius is double of focal length so radius is equal to double of focus
Radius= 2*focal length
R=2*10cm =20cm
So the radius is 20cm
1
Q3.By standing in front of all the three
•If the image is exactly equal to person or the substance.
•If we go close to a concave mirror it becomes mangnified and if the distance is increased then it forms magnified and virtual image.
•It will always form virtual image ,it will form an upright image if you are near the focus..
thanks sir me ye chapter 2 month se pad rhi thi pr concave and convex ke dout clear nhi ho rhe the but aapki is video se mere sare dout clear ho gye h🥰🥰🥰😇😇😇😇😇😇😇😇😇😇😇😇😇😇😇😇😇😇😇😇😇😇😇😇😇😇😇😇😇😇😇😇
Thanks sir 👍👍👍😊😊 good explanation
Most welcome
Thanks brother. I never heard this type of explanation with perfect daily life examples. We want this type of practice knowledge.
Great to hear that you liked the video :) Thank you!! Do check out more videos at www.manochaacademy.com
Sir you are the combination of good teaching and creativity.
Thank you sir, thank you so much for teaching us. Now I am your new subscriber sir.
Thanks and welcome
First question = a.) Convex mirror
b.)i am not sure but concave mirror
c.) Convex mirror
Second question = given focal length = 10cm so since radius =f/2 to gind f use f=radius×2. f=10cm×2=20cm
Third question= plane mirrors show us the same hight like the real object and the image is upright
Concave mirrors they can show as inverted and magnified images when we get close it gets magnified and when we get far from it it gets inverted
Convet mirrors they cover larger area for as to see and the rays are demnished
Thanks sir now i have an improved understanding about mirrors correct me if i am mistaken in my answers 🖒 Thanks
c shall be concave as dentist has to see the teeth closely so he can take precis operation btw im in 7th class
1. a. Convex mirror
b. Concave mirror
c. Concave mirror
2. 20 cm
3. When we place an object in front of a plane mirror it is of the same height.
In front of a concave mirror , it appears inverted.
In front of a convex mirror it looks small and diminished.
Our online classes have started and I didn't understand anything based on these. But when my friend share this link to me I just watched it simply. But now I am so encouraged and interested to study all these. Thank you so much sir.... For presenting all these in an easy manner☺️❤️
Glad it was helpful!
After reading this comment, my day is spoiled Thanks for spoiling my day
You deserve millions subscribers 👌👌👌👌👌💯💯💯💯💯
Thanks
I've learned more here than my actual class, thank you so much for this sir. Now I'm never gonna get confused by this topic.
You are most welcome
@@ManochaAcademy Hello dear sir, I have a question. I don't have a double sided mirror at home. But is the front side of a double sided mirror concave and its opposite a convex? Or its front a plane mirror while its opposite side a concave?
Q 1. a) Convex Mirror .
b) Concave Mirror .
c) Concave Mirror .
Q 2. Radius of curvature is 20 cm as :-
f = R/2
2f = R
2*10 = R
20 = R
Q 3. We can distinguish the mirrors by their reflection or by their shape .
Thank you 🙏
helo bhai can you clear my dought
my question is convex mirror main focus toh hota he nahi aur uss focus ko ham bana the ha mirror ke andar aur centre of curvature kasa andar ho sakta ha convex mirror ke?? pls tell bro
@@ranarajputana8021 See Bro
As we know that convex mirror is a diverging mirror so the light Ray which falls on the reflecting surface of convex mirror get diverged and will not meet together that’s why we stretch the light rays backward means behind the mirror so that the light rays can meet....
Focus is formed behind the mirror because when light rays which are parallel will pass through focus and the light rays will diverg and we will not get the focus from the original light rays to get the focus we will stretch the light ray backward so as to get the focus of the mirror..
Same case is for Centre of Curvature
Thank you
@@OjasBhayal ok bro thanks 🙏 bhai same with centre of curvature kasa hn issa bhi baata de bro
@@ranarajputana8021 Jo mene focus ko lekar explain kiya usme focus ko remove kar ke Centre of Curvature ko rakh do
Sub clear ho jaye ga