Question

For refraction through a small angled prism, the angle of deviation (RI means refractive index):

• A. increases with the increase in RI of prism.
• B. will decrease with increase in RI of prism.
• C. is directly proportion to the angle of prism.
• D. does not depend on RI of prism.

Answer 1

Answer: (C)

is directly proportion to the angle of prism.

Answer 2

For refraction through a small-angled prism, the angle of deviation $\delta$ is given by the formula:

$\delta = (\mu - 1) A$

where $\mu$ is the refractive index of the prism material relative to the surrounding medium (usually air), and $A$ is the angle of the prism. Therefore, the angle of deviation is directly proportional to the angle of the prism.