A monochromatic light is incident at a certain angle on an equilateral triangular prism and suffers minimum deviation. If the refractive index of the material of the prism is 
, then the angle of incidence is :
a.
30°
b.
45°
c.
90°
d.
60°
, then the angle of incidence is :a.
30°
b.
45°
c.
90°
d.
60°
Question ID - 50379 | SaraNextGen Top Answer A monochromatic light is incident at a certain angle on an equilateral triangular prism and suffers minimum deviation. If the refractive index of the material of the prism is , then the angle of incidence is :
a.
30°
b.
45°
c.
90°
d.
60°
A monochromatic light is incident at a certain angle on an equilateral triangular prism and suffers minimum deviation. If the refractive index of the material of the prism is , then the angle of incidence is :
|
a. |
30° |
b. |
45° |
|
c. |
90° |
d. |
60° |
1 Answer
127 votes
Answer Key / Explanation : (d) -
i = e
r1 = r2 = 
= 30°
by Snell's law
1 × sin i = 
× 
= 
i = 60
127 votes
Answer Link
127