A Light Wave Traveling in Air Impinges on an Amber

Multiple Choice

A light wave traveling in air impinges on an amber plate at an angle of incidence of 60º. If the angle of refraction is 34º, the velocity of light in amber must be approximately

A) 0.52 × 10⁸ m/s.
B) 4.64 × 10⁸ m/s.
C) 1.86 × 10³ m/s.
D) 2.09 × 10⁸ m/s.
E) 4.64 × 10¹⁰ m/s.