Question

Consider following statements for refraction of light through prism, when angle of deviation is minimum.

• A. The refracted ray inside prism becomes parallel to the base.
• B. Larger angle prisms provide smaller angle of minimum deviation.
• C. Angle of incidence and angle of emergence becomes equal.
• D. There are always two sets of angle of incidence for which deviation will be same except at minimum deviation setting.

Hint:

Remember the conditions for minimum deviation in a prism. The refracted ray becomes parallel to the base, and the angle of incidence equals the angle of emergence.

Answer 1

The Correct Option is A

\( \delta = I + e - A \) For \( \delta_{min} \)

\(\Rightarrow I = e \) and refracted ray is parallel to base A, C, D are correct