A scientist directs a laser beam from air toward an unknown plastic sample
PHYSICS · Single correct · A Level · Physics · Waves · Waves
Problem
A scientist directs a laser beam from air toward an unknown plastic sample. The incident angle in air is 30°, and the laser refracts inside the plastic at an angle of 19° to the normal. What is the best estimate of the index of refraction of the plastic?
(a) n=1.33
(b) n=1.68
(c) n=1.54
(d) n=1.58