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प्रश्न
Write the relation between the angle of incidence and the angle of refraction for a medium.
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उत्तर
The relationship between the angles of incidence and refraction is given by Snell's law.
According to this law, the ratio of the sines of the angles of incidence and refraction is constant for a given pair of media.
`"(Sineof angle of incidence (i))"/"(Sine of angle of refraction (r)"="constant (n)"`
This constant is known as refractive index.
संबंधित प्रश्न
After tracing the path of a ray of light passing through a rectangular glass slab for four different values of the angle of incidence, a student reported his observations in tabular form as given below:
| S.No | ∠ i | ∠ r | ∠ e |
| I | 30° | 19° | 29° |
| II | 40° | 28° | 40° |
| III | 50° | 36° | 50° |
| IV | 60° | 40° | 59° |
The best observation is
(A) I
(B) II
(C) III
(D) IV
Draw a ray diagram to show the refraction of light through a glass slab and mark angle of refraction and the lateral shift suffered by the ray of light while passing through the slab.
Name a prism required for obtaining a spectrum of Ultraviolet 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?
How does the deviation produced by a prism depend on the refraction index of its material.
Name the phenomenon responsible in the following case:
Twinkling of stars
Why does the sun appear bigger during sunset or sunrise?
What is lateral displacement?
