Question

An equilateral prism deviates a ray through ${40}^{\circ }$ when the angle of incidence on both the surfaces differs by ${20}^{\circ }$.The angles are

• A. ${40}^{\circ }$
• B. ${25}^{\circ }$
• C. ${50}^{\circ }$
• D. ${60}^{\circ }$

Answer 1

Answer: (A), (D)

The correct options are
A ${40}^{\circ }$
D ${60}^{\circ }$