A laser beam in air strikes a flat slab of an unknown transparent material at to the…
PHYSICS · Single correct · CBSE · Physics · Light — Reflection and Refraction · Light — Reflection and Refraction
Problem
A laser beam in air strikes a flat slab of an unknown transparent material at 40∘ to the surface normal. Inside the material the beam makes an angle of 25∘ with the normal. What is the best estimate of the material's index of refraction?
(a) 0.66
(b) 2.37
(c) 1.52
(d) 1.60