AIPMT | 2014Geometrical OpticsHard

Question

The angle of a prism is A. One of its refracting surfaces is silvered. Light rays falling at an angle of incidence 2A on the first surface returns backthrough the same path after suffering reflection at the silvered surface. The refractive index μ, of the prism is

Options

A.2sin A
B.2 cos A
C.cos A
D.tan A

Solution

         
Normal incidence at silvered surface
∵ μ = so, μ so, μ = 2 cos A

Create a free account to view solution

View Solution Free
Topic: Geometrical Optics·Practice all Geometrical Optics questions

More Geometrical Optics Questions

Which of the following quantities related to a lens does not depend on the wavelength of the incident light ?...Angle of prism is A and its one surface is silvered. Light rays falling at an angle of incidence 2A on first surface ret...An object O is kept infront of a converging lens of focal length 30 cm behind which there is a plane mirror at 15 cm fro...Velocity of light in glass, whose refractive index w.r.t. air is 1.5, is 2 × 108 m/Sec. In a certain liquid the vel...Two beams of red and violet colours are made to pass separately through a prism (angle of the prism is 60o). In the posi...