01:52 Discussing important questions on light reflection and refraction for Class 10. 02:43 Light numerical and conceptual questions are crucial for exams. 04:42 Understanding light's behavior during refraction and its relation to refractive index. 05:47 Speed of light is inversely proportional to the angle of refraction. 09:22 Refractive index is a unitless quantity defining light behavior in different media. 10:16 Understanding refractive index calculations for water and air. 12:27 Understanding light speed and refractive index in water and air. 13:27 Understanding the refractive index and light speed in different mediums. 17:19 Comparative refractive indices of glass, kerosene, and water. 19:05 Explaining scale conversion for drawing optics diagrams. 21:13 Understanding object placement and image distance in optics. 22:34 Understanding image distance calculations in optics. 25:01 Understanding key lens formula applications in reflection and refraction. 28:01 Understanding image formation using mirrors and magnification formulas. 31:01 Understanding image formation using concave mirrors in reflection. 35:16 Understanding focal length and image formation in lenses. 38:56 Importance of light behavior in everyday applications. 40:47 Understanding convex mirrors and their focal length calculations. 44:13 Understanding virtual images and magnification in mirrors. 47:53 Understanding image distance in lens combinations. 52:01 Understanding division and unit conversion from centimeters to meters. 53:15 Understanding lens types through practical questions. 00:00 Understanding key concepts of light reflection and refraction. Crafted by Merli
53:50 It is a convex lens since image is formed on a screen. 1/f = 1/v-1/u 1/f = 1/90 - 1/-45 1/f = 3/90 f = 30 cm....... Answer H²/H¹ = V/U H² = 90×2/-45 H² = -4 cm So image is of 4cm and it is inverted My name is Aseem agrawal (for shoutout 😅😅)
26:16 to 40:34 sir I have already done these 3 questions and if I am not wrong they must be from NCERT SCIENCE CLASS 10 and my answers are absolutely correct
Sir pls make a video on carbon and its compound (imp question) HW ANSWER :- 1/f = 1/v-1/u 1/f = 1/90 + 1/45 1/f = 1+2/90 1/f = 3/90 =1/30 f = 30 m = v/u = hi/ho m = 90/-45 = hi/2 m = 2/-1 = hi/2 4 = -hi hi = -4
Homework Question: Image is formed on a screen as it is real image therefore it is a convex lens u=-45 cm v=90 cm h¹=2cm 1/f=1/v-1/u 1/f=1/90-1/-45 1/f=1/90+1/45 1/f=1+2/90 1/f=3/90 1/f=1/30 f=30 cm m=v/u=h²/h¹ m=90/-45=h²/2 m=2/-1=h²/2 m=-2X2=h² m=-4 cm =h² (Inverted and Magnified image)
Homework answer m is -2 and h of image is -4 and it is a real and inverted + enlarged image and it is a convex lens sir jo apne bta hi Diya tha thanks a lot for ur efforts sir ❤️✨
53:50 ANSWER. HELPFUL PLZ READ ONCE 1/F = 1/V -1/U 1/F=1/90 -(-1/45) 1/F=1/90+1/45. (LCM OF 45 AND 90 IS 90) 1/F=1+2/90 1/F=3/90 F=90/3 F=30✓ AS THE FOCAL LENGTH IS POSITIVE THEN IT IS A CONVEX LENSE HEIGHT OF OBJECT=2 HEIGHT OF IMAGE/HEIGHT OF OBJECT=DISTANCE OF IMAGE (V)/DISTANCE OF OBJECT (U) HEIGHT OF IMAGE/2=90/-45 HEIGHT OF IMAGE/2=-2 HEIGHT OF IMAGE=-4 hence the image is real and inverted 🤘✌️ SIRJI YOUR EXPLANATION IS NICE. JUST LOVE IT ✌️❣️
31:21 sir think answer +6 hoga kyu ki magnification ka formula -v/u hota hai aur hamara v = -75 hai toh isliye "-"se "-" cat jaye ga aur + aaye ga Please sir ek bar explain kar dijiye bht confusion ho rha hai🙏🙏
Sir it was so amazing to study with your coaching students and so much fun I hope next time you will again make this type of videos it's like competition between online and offline student 😂
The refractive indices of glass and water with respect to air are 3/2 and 4/3 respectively. If the speed of light in glass is 2x 108 m/s, find the speed of light in water.
Plsssss anyone tell me a answer for my question that on 21:30 to make the convex lens we have to take compass as 9 cm to make 2f as 8 cm and f 4cm????????
Absolute refractive index mein dusra mediam (n2) kuch bhi ho skta hai woh question mein mentioned hoga but pehla media (n1) hamesha air hota hai Yeh tab use krte hai jab hame sirf ek mediam diya hota hai toh dusra air manna padta hai Hope you understand now 🥰
01:52 Discussing important questions on light reflection and refraction for Class 10.
02:43 Light numerical and conceptual questions are crucial for exams.
04:42 Understanding light's behavior during refraction and its relation to refractive index.
05:47 Speed of light is inversely proportional to the angle of refraction.
09:22 Refractive index is a unitless quantity defining light behavior in different media.
10:16 Understanding refractive index calculations for water and air.
12:27 Understanding light speed and refractive index in water and air.
13:27 Understanding the refractive index and light speed in different mediums.
17:19 Comparative refractive indices of glass, kerosene, and water.
19:05 Explaining scale conversion for drawing optics diagrams.
21:13 Understanding object placement and image distance in optics.
22:34 Understanding image distance calculations in optics.
25:01 Understanding key lens formula applications in reflection and refraction.
28:01 Understanding image formation using mirrors and magnification formulas.
31:01 Understanding image formation using concave mirrors in reflection.
35:16 Understanding focal length and image formation in lenses.
38:56 Importance of light behavior in everyday applications.
40:47 Understanding convex mirrors and their focal length calculations.
44:13 Understanding virtual images and magnification in mirrors.
47:53 Understanding image distance in lens combinations.
52:01 Understanding division and unit conversion from centimeters to meters.
53:15 Understanding lens types through practical questions.
00:00 Understanding key concepts of light reflection and refraction.
Crafted by Merli
2024 - 2025 Batch attendance
Bhai tu phir se aa gya 😂😂
Ha bhai ye firse agya
53:50
It is a convex lens since image is formed on a screen.
1/f = 1/v-1/u
1/f = 1/90 - 1/-45
1/f = 3/90
f = 30 cm....... Answer
H²/H¹ = V/U
H² = 90×2/-45
H² = -4 cm
So image is of 4cm and it is inverted
My name is Aseem agrawal (for shoutout 😅😅)
Virtual or erect hoti hai image to height of image -ve me aa rahe hai matlb inverted?😀
@@taeiya5918 toh bhai mene kab mana kiya
26:16 to 40:34 sir I have already done these 3 questions and if I am not wrong they must be from NCERT SCIENCE CLASS 10 and my answers are absolutely correct
Sir ko kitne khushi hoti hoge ke sb bache unhe kitna like krte h sb unse pdna chate h🤗🤗
👍
He don't care...He is married..
@@shauryasahu1618 so what I am talking about students 😌
Padhai kar
@@CHridaySharma first apply then supply
Phle khud to pd lo bad me kiseor ko bolna khud to comment pdke uspe reply krte ho🙄🙄
41:21 , bus is 😂😂😂
Sir pls make a video on carbon and its compound (imp question)
HW ANSWER :-
1/f = 1/v-1/u
1/f = 1/90 + 1/45
1/f = 1+2/90
1/f = 3/90 =1/30
f = 30
m = v/u = hi/ho
m = 90/-45 = hi/2
m = 2/-1 = hi/2
4 = -hi
hi = -4
same a rha hai bha 🙃
33:04
I literally had a mini heart attack.
(Headphone user)
Sir f is 30 and height of image is 4 cm and lens is convex
Height is -4
Homework Question:
Image is formed on a screen as it is real image therefore it is a convex lens
u=-45 cm
v=90 cm
h¹=2cm
1/f=1/v-1/u
1/f=1/90-1/-45
1/f=1/90+1/45
1/f=1+2/90
1/f=3/90
1/f=1/30
f=30 cm
m=v/u=h²/h¹
m=90/-45=h²/2
m=2/-1=h²/2
m=-2X2=h²
m=-4 cm =h² (Inverted and Magnified image)
Sir your teaching method is really wonderful..Hope aap agey aur ache vedios lekar aaye
🙏😊
2.2 ayega
13:33 sir it will be 2.2×10⁸ I think so
Me too
2.25×10⁸
Last question - the lens used is convex and the object is at the F1 and image is formed at F2 .The height of object is 2 and that of image is 4.
Height is -4 cm
🧐
But sir Ascending order mein to Water
17:51 sir kya ye aapne descending order mein nhi lga diyaa 🙄
47:00 , 2
13:54 2.25 × 10⁸
That "bolo Maro" was epic
Yess😂😂
F=+30cm
m=-2cm
Real and inverted
hi=-4cm
Magnified
13:40 answer is 2.25*10^8
2.26*10^8
3:40 start
Answer:-
Focal length 30 cm
Height of image 4 cm
Lens is convex sir
Height of image is -4 cm
Homework answer m is -2 and h of image is -4 and it is a real and inverted + enlarged image and it is a convex lens sir jo apne bta hi Diya tha thanks a lot for ur efforts sir ❤️✨
What is focal length bro
f=30cm
@@chhavindranetam6778 focal length means pole aur focus ka bich ka distance ko focal length kehta gai jisa "f" Se denote karte hai
❤❤❤❤Sir kya padhate hai maja hi maja mast padhate hai❤❤❤❤❤❤❤
Thank you so much sir ☺️☺️
Thank you soo much sir.... Aap bahut acha padhte hai 😊
Sir yaha pe v - hona chaeye tha n.. 53:43
You are best teacher 🎉🎉
53:50 ANSWER. HELPFUL PLZ READ ONCE
1/F = 1/V -1/U
1/F=1/90 -(-1/45)
1/F=1/90+1/45. (LCM OF 45 AND 90 IS 90)
1/F=1+2/90
1/F=3/90
F=90/3
F=30✓
AS THE FOCAL LENGTH IS POSITIVE THEN IT IS A CONVEX LENSE
HEIGHT OF OBJECT=2
HEIGHT OF IMAGE/HEIGHT OF OBJECT=DISTANCE OF IMAGE (V)/DISTANCE OF OBJECT (U)
HEIGHT OF IMAGE/2=90/-45
HEIGHT OF IMAGE/2=-2
HEIGHT OF IMAGE=-4 hence the image is real and inverted 🤘✌️
SIRJI YOUR EXPLANATION IS NICE. JUST LOVE IT ✌️❣️
31:21 sir think answer +6 hoga kyu ki magnification ka formula -v/u hota hai aur hamara v = -75 hai toh isliye "-"se "-" cat jaye ga aur + aaye ga
Please sir ek bar explain kar dijiye bht confusion ho rha hai🙏🙏
Are lekin u ki value minus me h to -6 hoga
Sir aap bhut acha pdha te thanx😊
❤
Sir it was so amazing to study with your coaching students and so much fun I hope next time you will again make this type of videos it's like competition between online and offline student 😂
Great sir 👍
Video ke starting ke 1:30 minute tak mujhe laga that my phone is hanged 😅
Aree sir paad rahe h 🤣
no, sir answer is
n ∝ 1/v
7:05
Thank u sir 😌
10:09 sir refrective index c/v hota hai
Sir 2.8 × 10^8
Sir u have arranged the densities in descending order but it was written to arrange the densities in ascending order.
HW - ans
f=30cm
height of image = 4cm
Height of image is -4
concave lens last question
38:30
Sir magnitude of magnification more than one hai to vo enlarged hoga n........per aapne same sized q likha hai
vo height of image nikali hai unhone , to us basis pe judge kra hai unhone
@@strifeisback4818 aare hm thanks bro
13:54 answer is 2.25 . 10 power 8
Sir best explanation ever
28:50 sir - to real inverted to show krta h lens me aur mirror dono me tab aapne aasa kyu bola
13:45 its 2.25 approx
Sir full physics questions class 10 plzzzzz
The refractive indices of glass and water with respect to air are 3/2 and
4/3 respectively. If the speed of light in glass is 2x 108 m/s, find the speed
of light in water.
2.8×10 to the power 8 👍👍👍👍
2.25 × 10⁸ m/s
2.25 ×10⁸ m/s..
31:19 sir diminished aayega
H/W:-
Lens = Convex lens
Focal length = 30cm
Height of image = -4cm
50:10 which lens
Covex lens hoga bhai kyonki focal length + mai hai
Plsssss anyone tell me a answer for my question that on 21:30 to make the convex lens we have to take compass as 9 cm to make 2f as 8 cm and f 4cm????????
sir 11th me aage kuch karvao
Focal length 30 cm
Height of image 4 cm
Lens is convex sir❤️
Height of image is -4
Converging lens
Sir Hindi Mein Bhi padhay Karo please search 🙏🙏
My confidence is boosting . GOAL 98%+ IN BOARDS
Badiya bhai lge rho 👍
Carbon and it's compounds
So wonderful class sir
38:52
Important question answer carbon and it's compound please laiye
38:50
Moja🙏
Dono coaching aur yt ek sath
Sir ye video rbse ke liye bhi hai ki only cbse??
Sir heredity karwa do please ############### in bio
Last answer -- Focal length is 30cm and height of image is -4cm
Is this correct ? 😅😅
bro sir done a mistake in 31:20 m=v/u is used in lens but sir mistake ly used m=-v/u
11:16 sir ye toh absolute refractive index hua na. Kyuki air h relative ma toh dono media kuch bhi ho sakte h but air nhi
Absolute refractive index mein dusra mediam (n2) kuch bhi ho skta hai woh question mein mentioned hoga but pehla media (n1) hamesha air hota hai
Yeh tab use krte hai jab hame sirf ek mediam diya hota hai toh dusra air manna padta hai
Hope you understand now 🥰
Osm
Sir question 4 answer is 2.25*(10)8
Bata diya bhai
Sir Hindi ma bhi pabho please ❤
Sir is pure chapter ki video laiye please Ashu sir
Ok sir
Sir new join sir ek doubt hai
Sir next class 10th ki live video kis chapter ki hogi
sir aap experience teacher hi
Sir ji ye bolo Maro kya hai 😂😂😅
Sir wo 12 units hoga 12 cm nahi
18.00
Ye numericals mere kab samjh ayenge 🤔
Board k baad 😢
Kadva sach 😅
Ohh ho dost ko Bina bataye padhai suru kar de 😂😂
Jai shree ram🚩🕉
🕉
Sir carbon krva do
Concave
Convex lens
Secured
Hlo sir mai up board se hu tho mere liye bhi ye important hai please tell me sir
Sir 2. 25 aayega
YESSIR :)
Sir class ki pdf kaha milegi
🅷🅸🅸 🅴🆅🅴🆁🆈🅾🅽🅴
Hi my friend
Pdf of lectures
Sir-6 kaise aaya
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Hey Ashu answer the comments😒
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Sir aap chalak mat baniye plz hmlog ko alag se class kriye
Mereko kuch samaj nhi aa raha hai
khud seee hi naraxz hu mai
Sir plz replies
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