A Beam of Light Traveling in Air Strikes a Slab

Multiple Choice

A beam of light traveling in air strikes a slab of transparent material.The incident beam makes an angle of 40° with the normal,and the refracted beam make an angle of 26° with the normal.What is the speed of light in the transparent material? (c = 3.0 × 10⁸ m/s)

A) 1.0 × 10⁸ m/s
B) 2.0 × 10⁸ m/s
C) 2.3 × 10⁸ m/s
D) 3.0 × 10⁸ m/s
E) 0.50 × 10⁸ m/s