Question

What is total internal reflection?

Options

• The bending of the refracted ray away from the normal.

• The travel of the refracted ray along the boundary surface.

• The passage of light from the denser medium into the rarer medium.

• The complete reflection of light back into the denser medium.

Answer 1

Total internal reflection means that light is completely reflected back into the denser medium. It occurs under the denser-to-rarer conditions when the angle of incidence is greater than the critical angle.