Question

A monochromatic ray of light is incident normally on one refracting face of an equilateral glass prism. Trace out the path of the ray till it finally emerges out of the prism. The critical angle of glass is 42ᵒ.

Answer 1

Answer:

Angle of incidence should be at 60 degrees on the second face. Which means the light ray is incident at an angle more than the critical angle. So the light ray is totally internally reflected back in to the prism from the second face. Theangle of reflection will be 60 deg.