Why is REAL IMAGE inside the MIRROR? [Student Doubt]
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- Опубліковано 19 вер 2024
- Quick and dirty video to clear Shaurya's doubt!
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Next time anybody asks me "What's the use of Science in real life?" I am going to show this.
More than science. It’s the scientific thinking that can be applied to real life.
You can apply it to relationships, careers, and big life decision.
Will make a video soon on those topics
Namaste sir, I am your student my name is Rohit, currently studying in 12th in KV. On 6th March I am going to write my Physics Board exam. I just loved your Khan Academy videos of 12th. And they make me understand the beauty physics in a better way. Sir you are one or the best physics teachers I had ever seen. Love you sir. And please keep your blessings with us. One more thing that I want to become a Scientist and I am actually working on many projects. I will share them with you after my exams get over. Once again thank you so much.
Wow, all the best! Rohit :)
Deserve millions of views. But problem is with todays youth they are just completing the syllabus by byhearting the theories and formulas.By doing this they will never know the beauty of science.seriously I was also very excited to know this.
Thanks Man❤
Not only did it answer the question, but also I finally Understood that this is the same this we do in the practicals with optical benches! Wow thankyou so much Sir! I always thought parallax was some kind of error that we have to remove!!
Haha, there is parallax error too. But like most things in life, there is always more to it
This person's passion can literally be felt from the screen, amazing job.
Sir i have never seen such a amazing teacher in my entire life ur legend.
Sir I really like your passion for teaching! Everyone deserves a teacher like you.
Such kind words, Dityahar
@@Mahesh_Shenoy Sir can you please explain that why dispersion of light takes place only in glass prism and why not in glass slab? Is it because of the parallel surfaces of slab?
@@dityaharpatipraja4442 it occurs in glass slab too, think glass slab composed of two triangular prism and you must be knowing about the recombination of different colours when two prism are placed in inverted manner, same happens in the glass slab.
Sir this was the really amazing explanation i have ever seen, the way you observe and connect the things with concepts and real world is really fantastic.
We need teachers like you in India
You have the true gift of a teacher. I hope you know how many people you’re helping and entertaining!!! Your connection between the physicist and the layman is unbelievable, and the best I’ve ever seen! And that’s not hyperbole!!!!
Amazing physics teacher. I see your passion for physics in every video. Shout out!!
Always answer these questions in the same way by making videos and showing practically ..We students like it this way..
Awesome to hear that!
Same can be observed when we see ourselves inverted in steel spoons...am I right?😅😆
But this was literally mind blowing your enthusiasm makes me even excited to study physics!
Thanks alot sir❤
Absolutely! Thanks Sanika. I am glad it helped!
Thanks sir ,it really helped me a lot about most of misconceptions
SIR! THIS WAS MIND BLOWING!!! we actually have a physics practical in 12th standard and there we have to obtain focal lengths of mirrors and lenses and the parallax finger thing is the exact same principle we have to use in the most basic steps.... none of the teacher could explain how are we supposed to do the alignment and only told that we had to do! They never told the basic science behind it and it had always been my question... ooh! Thanks to you I got my doubt cleared TODAY FINALLY!!!😊
Yes, I too felt the same. We just did the experiment without ever wondering why it worked. But, it’s so beautiful once we realise it. I am glad you resonates.
I just realised that this is how we find out focal length of a convex lens in our KSEAB board practical exam.
Yes!! But those practical’s seem so freaken boring!!!
This dude cleared the doubt so beautifully ... Just loved it
THANKY YOU!!!! Why don't physics teachers teach this !!
So, finally understood the real meaning and what's its use and actually what I was doing in real sense during my optic practicals, now I'm never gonna forget it. Thanks a lot😊👍⚡
Haha, awesome to hear that! Dev
Wow! This is mind blowing!!! Sir we really need teachers like youu! Who explains us with so much of enthusiasm 😃
Haha, thanks Anjana :)
Can be performed in a real classroom. Awesome.
Yes, my fav things to do!
Never had this idea.Really loved your explanation.So on point with enthusiasm.❤❤
Keep teaching
The pure excitement in your voice had me smiling throughout the video :)
Awwww, thanks Udhav 🥹
Sir how we are able to see total internal reflection from outside if all the light are reflected inside, and how we are able to see the path
Love your question. Will Make a quick video
Nice question I also have a same question
You just made me realize the image must exist all along the path of the light. Not just in the bottle or in the air in a certain spot. It is also on your retina.
what I learned from this vid is how to determine if the image is closer or farther away from me but I still don't understand how we're able to SEE the image when it is not inside the mirror
How do you see objects (things) in general? And then try to see if you can relate it to the real image.
Maybe you can also try to answer why things can be see from all angles but real images can only be seen when looked at directly towards the mirror?
So many wonderful deep questions. Love love love it ❤️
@@Mahesh_Shenoy hmmm I'll ponder on it... thank u so much!!!
One of the most knowledgeable channel i found randomly :) :) and now i am a regular viewer ❤❤❤
Lovedd the energy and beautifully explained!! I love how raw that was🤓
Awww, thanks Vaidehi :)
This channel is really really underrated.
Just raw amazing !!
Really? :D. I just wanted to see how much sense I make if I just just upload stuff raw.
@@Mahesh_Shenoy yeah , it was so fun to watch you excited about telling us this concept
OH! I had ask the same doubt in one of your very old videos! It's such a coincidence!
Haha, hope it’s resolved now :)
The usage of parallax method was creative, you could have also held a small white board behind the water bottle and since the image is real, it will project onto the white board.
Thank you so much for answering this question because I myself was very confused on this for years and everyone I asked it to ignored my question. I finally understood it. But another doubt arose... I would appreciate if you clarify it... What happens if the object is between c and f? Since image will be formed behind the object, from the object's pov will the image be visible in the mirror or not? If yes then Why? PLEASE ANSWER THIS I AM VERYYYY CURIOUS
No, according to my understanding it wont be visible in the mirror. The parallel rays will go right past the object
Wow physics is awesome!
Question here it is you see the image in the lens or mirror.but it is formed out side.then what we see
Awesome mind blown video
Can you please teach entire calculus for physics for IIT JEE .
amazing answer to the question! I'll use it in my classes. Thank you so much! such a livewire!
You are welcome Gyanesh ji :)
I think you could be seeing the image inside the bottle on a different part of the surface. Like when you move around in front of a mirror and you see images move to different parts of the mirror.
But Sir, can you please explain what and how we actually see on the bottle whether it should only be seen in a screen or out side of the bottle(in the space)...?
Sir please clear my doubt why does curvature of lens effect the focal length
Kudos to your passion, Sir! 🙌 T'was a lovely explanation👍
Thanks, Shruti. Glad it made sense :)
Great passion sir.
Basically I had a doubt about gravitation n spinning of the earth.....
Whenever we jump above the ground we are above it for a little time but we know that earth is rotating continuously (data says approx in 1 min it rotates 27 km) but then why do we come back to the same place after jumping where we had jumped?
Please answer this sir🙏
Love it. Will make a quick video
@@Mahesh_Shenoy And why not we are able to see anything else rotating while we are in air?? suppose in hot air balloon
@@ayushishukla4014 wow nice question
He already has answered this question in this video.
ua-cam.com/video/H3XvX34SF3M/v-deo.html
I think it is because we are launched with some initial velocity in the direction of spinning of the earth, the same phenomenon when we throw a ball up from a moving tempo(open van) and are able to catch it, instead of it being left out on the road... Please correct me if am wrong!
Wow! Now, one have cleared my doubt. Thank you sir. 💚
In concave mirror the real image are formed outside the mirror but why we realize them that they are in the mirror . Sir this was the question behind this vedio
Really helpful concept❤
Thanks, Komal :)
This was beautiful!
i had this question , why do we see nearer objects bigger but farther object smaller , in 10th standard but , at that time i didnt know about parallax , so i thought it in mathematical way.. that the possible answer to this could be the angle of sight of the object at our eye, i.e, the closer the object the bigger is the angle of sight while when the same is seen from far away it makes smaller angle of sight .
i almost took one year to get to this solution as an intuition (on my own then existing knowledge and examples i could have thought at that 10 standard )
I had one more question about real image that what if we are trying to see the image from the point before the image was formed by looking in the air.
Therefore from here ,can we conclude that to form real image not need to establish a screen in front of mirror?
WOW SIR!!!😮
We have two eyes so we can judge depth, I guess that is using parallax everyday!
Is reflection by plane mirror,wrist watches on walls of room for sunlight are real images? As those are we are able to catch them on walls...sir I feel those reflection are real images ....
Sir, i had the exact same doubt about spoons when i was in class 8.....thanks a lot
Thank you sir
Great video
Sir please clear my doubt
In an pure inductor ac circuit we see that the net energy consumed by inductor or circuit is zero in one complete cycle .... But we are doing some mechanical work in rotating armature then where did our energy go ???? since there is no resistance in circuit so ofcourse our energy did not waste in heat.
Great question! Can you make a guess?
@@Mahesh_Shenoy no
I can't think any solution
I am so disturbed now due to this question
Please answer as soon as possible
@@Mahesh_Shenoy sir when will you answer ??????
The energy is converted to kinetic energy of rotation!
@@Mahesh_Shenoy can you explain through video ?
If it is nearer than your finger then where is it forming? On air?
This is kind of amazing, thank you sir.
Great ❤
Thanks sir
Bro damn I have never Felt Such Joy Learning Something Demnnnn Love this teaching of yours 😊😊❤❤
Sir how a image can form back of a mirror in a plane mirror
This was mind blowing . Thank you so much for the practical explanation
Thanks, Rishitha. Glad it helped :)
Does real inverted image formed by concave mirror shows lateral inversion
Amazing
very good experimental demonstration :)
Sir I have a question does image actually form when object is placed at focus in case of concave mirror if yes then how can parallel rays meet to form I image at infinity
what is the real meaning of potential difference across a battery is 10 v what is the meaning of this Can we assume it as that 1 Coulumb charges has a difference of 10 j of energy
Absolutely!
@@Mahesh_Shenoy Sir how exactly this difference is created i am confused
@@Mahesh_Shenoy please reply
@@mr2.0facts84 It's created by the chemical reactions in the battery, that shuffle positive ions to one terminal, and negative ions to another terminal. There are two pieces of dissimilar metals, soaking in an electrolyte to connect them. This causes corrosion of the metals that either attract negative ions or positive ions, depending on the metal's identity.
omg excellent 👌, real image can be obtained on the screen
Sir , how does our brain extract the inververted image 2d image into the 3 d image ?
Hii I had a question about perpendicular work, my teacher tells me that it is when displacement and the force applied have a 90 degree angle between each other but I don’t think that a perpendicular force can ever lead to displacement; Only other forces not giving an object displacement can be doing 0 work like gravity on a moving car, but walking with a basket on my head should not be an example or perpendicular work since I am pushing the ground with my legs in the direction opposite to displacement
I am a little confused. Can you take one specific example and elaborate what the teacher thinks and how you think differently?
@@Mahesh_Shenoy Yes, so my teacher told me that an example of perpendicular work would be to pick up a bag or some basket and walk with it, she said since you are displacing the object while applying a force in the upward direction (against gravity to pick up object) there is a 90 degree angle between you pulling the object upwards and the displacement when you walk along a linear path, but my doubt here is that the upward force to pick up the object does not influence the displacement itself so an exact 90 degree perpendicular force can never ever cause displacement
And so almost anything can be considered an example for perpendicular work even something like pushing a car where the car displaces forward in the direction we push it in but if we consider only the force of gravity on the car which does not affect its displacement and makes a 90 degree angle with the displacement, then even that is an example of perpendicular work
You are absolutely right! That’s why there is no such thing as ‘perpendicular work’ :D
When force and displacement are perpendicular to each other, as you said, the force would have zero effect in the displacement direction and hence would have done zero work in displacing the object in that direction.
My guess is your teacher was just asking you to identify where the force and displacement are perpendicular
Sir, how the real image actually forms .... I know all the bookish stuffs that when reflected rays meet together rhen they form real image.. but why??and what happens if not all the reflected rays meet at a same point??
Love the fundamental questions that you are asking, Vishnu :)
What’s your guesswork for your own question?
soooooooo longgg with this doubt sirrr..thankyouuuu
👌 Wow
So why does it seem like image is inside the water bottle
Because we are not good at telling how far something is without shadows and size comparison.
This was amazing! I have to ask, don't we get to know which image is closer based on the angle subtended at the retina, and the further away it is from the macula, the closer the image is? If a person has only one eye, they wouldn't know which is closer and which is further. Can you coalesce this fact with the parallax technique's findings and explain what's going on?
How does the brain know the angle subtended?
Also, further away from macula, bigger the image. That’s all one can conclude, no?
@@Mahesh_Shenoy the brain calculates based on the distance away from the macula and the side from where the light falls. The more lateral the light falls on both the retina, the closer the image. Bigger images have a greater area where the image is formed. In case the images fall on the macula because the eyes are pointed towards the image, the brain adds in the fact that the eyes are accomodated and factors this in to identify the location.
I don’t quite get it! With just one eye, I can’t imagine how you can convert 2D information from the retina into 3D data. It doesn’t seem to make sense to me!
If it’s the accommodation, then it should only practically work for close proximity, right? After a point the difference would be too insignificant to notice!
@@Mahesh_Shenoy yeah, we need two eyes in order to have stereoptic vision, which tells us which object is closer to us.
Yeah, when it comes to accomodation, it only works for objects a certain distance away. Was just trying to close the loose ends
@@fgorn Acha, I read your original comment again. It's the parallax that enables dept with two eyes and you wanted me to bring that out. Got it :D
Isn't it a virtual image as it is reversed??
🥹🥹I sometimes daydream teaching someday like this... sharing all the excitement, amusement etc.. whatever.... that different kind of happiness you get when your listener understands and gets the intuition behind what you're trying to say is... inarticulate 🥺🥺🥹🥹
Btw.. I'm an undergrad student in a tier 3 clg...
Oh man, such kind words! Thanks bud
Tqu... Sir
Welcome, Siri :)
So what we are seeing in the bottle, is it the reflection of the real image which reaches our eyes ?
It just appears to us that we are seeing it in the bottle in this video
When you do the experiment, you will actually see it in front of you
Amazing explanation Sir!
Sir, I had a question do you feel there is actually some difference between primary and secondary focii of a lens? Or, is it right to say that primary focus will become secondary and vice versa, if the position of object is changed(from one side of lens to its other side)?
And another question, primary focus of convex lens is negative while the secondary one is positive. The why is power of convex lens positive? In the formula P=1/f, why is it secondary focus that's considered and not the primary one?
As far as I understand ‘primary’ and ‘secondary’ are useless terms. There is just one focus. And, for a thin lens, the focal length is the same from either sides.
How can I ask doubts with you sir
Ask it here. Ask awayyyyy
@@Mahesh_Shenoy 1.When a 4V battery is connedcted across an unknown resistor there is a current of 100 mA in the circuit. The value of the resistance of the resistor is
(1)4 (2) 40 (3) 400 (4) 0.4
2.(i) What is meant by the statement that the resistance of a wire is 12? (ii) Two identical resistors each of resistance 122 are connected (i) in series (ii) in parallel, in turn to a battery of 6 V.
Calculate the ratio of power consumed in the combination of resistors in the two cases. (iii) What combination is used for connecting the circuit to measure the potential difference across two points?
3.A cylindrical conductor of length I and uniform area of cross-section A has resistance R. Another conductor of length 21 and resistance R of the same material has area of cross section
4.Resistance of a metal wire of length 1 m is 26 ohm at 20⁰C . If the diameter of the wire is 0.3 mm, what will be the resistivity of the metal at that temperature? Using Table 12.2. predict the material of the wire.
Main problem is how to calculate long numbers in electricity class 10
damm really well explained
Very beautiful 🫡
nothing to say just a big thank you to you.
sir! you know what we were sooo lucky enough to get you as a lecturer in our SPSM. man we just can't forget your expressions.❤❤
Oh man. Good old days :) :). Thanks for that comment Adarsh :)
What's spsm?
Yeah what is it??
Sir please make Physics videos
Greatest
1:00 please answer it. How can you say that what is visible inside the bottle is real image, just by saying the arrow is flipped, well it is due to lateral inversion. You can see in the bottle that keyboard in the bottle in bottom only and this means image is not inverted so how it is real, Pls explain
edit: if that is real image and is in front of the lens then how can we see it without the screen. Please explain it, am confused in this.
sir please reply if i am wrong. As a tenth grade student i can miss something. Please clarify
That’s a really good question,Karan! Can you tell me more about the keyboard thing? That’s an interesting point!
i said in the timestamp mentioned, inside the bottle the keyboard is visible in bottom means the image has not been inverted so that's why i am confused if the image is actually real or virtual only.
and as image seems to be erect, it may be virtual only sir. pls clarify the doubtt
🙏
No no, this is a really good question and I think I will do a quick follow up video on it!
These are the questions that only come up when you do actual experiments.
Wow beautiful
That was goood😄
Even i too got the same doubt 😂❤️
I'm so lucky to have found you
Sameeeee
Sir isn't the water bottle working as a lens instead of a mirror
Yes, but the concept of real images holds. Right?
@@Mahesh_Shenoy but sir, could you explain it with using the mirror ??