Question

If n_water = 1.50 and n_glass = 1.33, then total internal reflection at an interface between this glass and water:

may occur when the light goes from water to glass.

may occur when the light goes from glass to water.

can never occur at this interface.

occurs whenever the light goes from water to glass.

occurs whenever the light goes from glass to water.

Answer 1

Solution) For total internal reflection to occur , the light should travel from denser medium (greater refractive index) to rarer medium (lesser refractive index) .

So in this case it happens when light travels from water to glass .

Option (4)

Occurs whenever light goes from water to glass .