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प्रश्न
Name the phenomenon responsible in the following case:
Twinkling of stars
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उत्तर
Refraction of light
संबंधित प्रश्न
A light ray in passing from water to a medium
(a) speeds up
(b) slows down. In each case, give one example of the medium.
A ray of light is passing from a transparent medium 1 to another transparent medium 2 (i) Speed up (ii) slows down. In each case, state whether the refractive index of medium 2 is equal to, less than or greater than the refractive index of medium 1.
What do you understand by the statement the refractive index of glass is 1.5 for white light?
Fig. shows a ray of white light that passes through a prism and produces a spectrum.
(a) Name the phenomenon that is taking place.
(b) What colour would you see at X and Y?
(c) What radiation would you detect above X and below Y?
Name the phenomenon responsible in the following case:
Apparent bending of a stick in water
A glass slab is placed over a page on which the word VIBGYOR is printed with each letter in its corresponding colour.
- Will the image of all the letters be in the same place?
- If not, the state which letter will be raised to the maximum. Give a reason for your answer.
State the relation between the refractive index μ and the velocity of light (vm) in that medium.
Define the term refractive index of a medium in terms of velocity of light.
How will you verify the laws of refraction or how the refractive index of glass is determined in the laboratory?
The diagram shows the path of a ray of light through a rectangular glass block placed in a liquid of uniform density.
(a) Does the light speed up or slow down in the glass,
(b) Give the reason for your answer.
