Question 382: Ray Optics

Question

A ray of light is incident at an angle of incidence i, on one face of a prism of angle A (assumed to be small ) and emerges normally from the opposite face. If the refractive index of the prism is $$\mu $$. the angle of incidence i, is nearly equal to

Accepted Answer

For normally emerge e = 0
Therefore r
2
= 0 and r
1
= A
SnellÃ¢ÂÂs Law for Incident rayÃ¢ÂÂs
1sin i = $$\mu $$ sin r
1
= $$\mu $$sin A
For small angle
i = $$\mu $$A

Answer

$$\mu $$A

Answer

$${{\mu A} \over 2}$$

Answer

$${A \over \mu }$$

Answer

$${A \over {2\mu }}$$

Ray Optics

A ray of light is incident at an angle of incidence i, on one face of a prism of angle A (assumed to be small ) and emerges normally from the opposite face. If the refractive index of the prism is $\mu $. the angle of incidence i, is nearly equal to

Choose the correct answer: