When total internal reflection happens at a plastic-air interface
A) half the light is refracted.
B) half the light is reflected.
C) light hits the interface from the air side.
D) light hits the interface from the plastic side.
E) the law of reflection ceases to hold.

Question

Quizplus · Accepted Answer

Total internal reflection occurs when light travels from a medium with a higher refractive index (plastic) to a medium with a lower refractive index (air) and hits the interface at an angle greater than the critical angle.

When Total Internal Reflection Happens at a Plastic-Air Interface