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प्रश्न
Trace a ray of light incident at 30° on a surface if travelling from air to glass. What is the angle of refraction in this case? (R.I. for glass = 3/2).
उत्तर
aμg = `sin"i"/sin"r"`
∴ `3/2=(sin30°)/sin"r"`
∴ Sin r = `2/3xxsin30°`
But sin 30° = `1/2`
∴ sin r = `2/3xx1/2`
= `1/3`
∴ sin r = 0.3334
∴ sin r = 19°30′.
Angle of refraction for air to glass = 19°30′.
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संबंधित प्रश्न
State the dependence of angle of deviation On the refractive index of the material of the prism.
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(a) equal to the angle of incidence
(b) greater than the angle of incidence
(c) smaller than the angle of incidence
(d) 45°
Fill in the blanks to complete the following sentence
The refractive index of glass with respect to air is 3/2. The refractive index of air with respect to glass will be ……………….
A ray of light falls normally on the surface of a transparent glass slab. Draw a ray diagram to show its path and also mark angle of incidence and angle of emergence.
Rahim recorded the following sets of observations while tracing the path of a ray of light passing through a rectangular glass slab for different angles of incidence.
|
S. No. |
Angle of incidence |
Angle of refraction |
Angle of emergence |
|
I |
45° |
41° |
45° |
|
II |
40° |
38° |
38° |
|
III |
45° |
41° |
40° |
|
IV |
41° |
45° |
41° |
The correct observation is recorded at serial number:
(1) I
(2) II
(3) III
(4) IV
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