Light: Reflection and Refraction | NCERT Intext Questions | Refraction of Light | SHIKHAR 2024
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- čas přidán 6. 09. 2024
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Sir,
Why the optical density of water increases when it is freezing into ice?
For example: When the water is in normal temperature, it is transparent. But, when it freezes, why does it's color turned into white(irrespective of pure water)?
So, by this, could we conclude that the temperature can change the optical density of an object
Sir,
Why the light rays are capable to gain energy(Kinetic energy) after the refraction from rarer medium to denser medium?
Why couldn't light go at the same speed after the refraction as in the denser medium?
Sir Doubt
Sir is the aperture of lense the refracting SURFACE of the lense or the whole [VOLUME] Lense because refraction not only depends on surface but also to whole lense
Sir please tell
Good Afternoon Sir,
Sir, I have a question/doubt about the topic application of spherical mirrors:-
Question:- Draw the ray diagram or show it using a diagram, the case of a torch's reflecting mirror?
1) We have taken the bulb at the focus of a concave mirror, the first ray is parallel to the principal axis and passes through focus, and the second ray passes through C and retraces its path back. A parallel beam of light is obtained which illuminates some area.
Sir first, this ray diagram, and it is correct
But sir is the second also correct as a diagram/ray diagram?
2) In a convex mirror bulb is kept at the focus, and the rays are spread over the mirror and it gets reflected (diverged). In this, the light gets diverged and we are able to see more area.
Sir, is this correct?
Sir please tell
Sir your classes are Awesome
How can an object be placed inside the mirror
Sir, I have a doubt. Why window glass act like glass from inside and mirror from outside in morning and like mirror from inside and glass from outside in the night?
A window does not turn into a mirror at night anymore than it does during the day. However, at night, there is very little sunlight from outside, meaning that it is simply easier to see the light coming from inside that gets reflected off the window. This makes the window act as if it were a mirror.
I hope your doubt has cleared..😅
@@suman_nxdf thank you :)
how can we see transparent objects if all light passes through it?
59:00 if smaller aperture can focus light on a single point in case of concave mirrors, then why can big convex mirrors fixed at the parking slots etc. Form clear images sir pls explain this
thankyou for such a nice session!!!!!!!!!!😀😀, all doubts get solved
Sir, how can absolute refractive index be constant, although it is same for speed of light in vaccum but it differs in speed of light in medium as it is having different mediums
Sir Angle Of Incidence And Angle of Refraction is Equal ??????
Thank you sir
Why light doesn't bend while passing through optical centre?
Why does light bend on refraction
Why does light slows when it enters an optically denser medium from an optically rarer medium?
Hey, Have a look at this link over here. This should help a little... physics.stackexchange.com/questions/105573/why-does-the-light-travel-slower-in-denser-medium
Sir is there is difference between refractive index 👉 and optical density..are both are same.if same wgat is relation
optical density is like light ki speed while coming from vacuum to any other medium slow ho gyi, but thodi slow hui ya zyada slow hui?
and refractive index is kitne times slow ho gyi? speed in vacuum/speed in any other medium.
Sir I have a doubt
Why this refraction occurs???
Please answer my doubt sir.. humble request....
Thank you..And love juu sir ...
due to different media
Doubt 25:00 cv1/c 2 then how we get v1 /v2 plz help
Sir as took an example of oil and water, are density and optical density inversly proportional?
No, not everytime bro
Inversely *proportional* means that the relation is inverse. Means that there will be a inverse as well as proportional change in other when one is affected....
And there is no relationship between optical density and mass density
Medium is 1 vacuum
why it is taken sine rather than cosine or tangent ????
can we draw the normal at any point on a spherical mirror?
Yes
@@nehaprajapati1576 given that it passes from centre of curvature to point of incidence
Does R=2F also apply to lenses?
No 👍 lenses have different formula . I hope it helped
Sir why white and other shiny colours reflect the light
Sir teaches great❤
agree!!!
Live chats are off
Thankyou mam❣️❣️
Shall the the answer of 5th q be refrctive index of diamond with respect to air is 2.42 💢💢💢💢💢