When light passes through an ordinary window pane,its angle of emergence is
A)usually less than its angle of incidence.
B)always less than its angle of incidence.
C)the same as its angle of incidence.
D)usually more than its angle of incidence.
E)always more than its angle of incidence.

Question

Quizplus · Accepted Answer

When light passes through a window pane, it undergoes refraction twice, once when entering and once when exiting. The angle of emergence is equal to the angle of incidence due to the reversibility of light paths and the parallel nature of the surfaces of the pane.

When Light Passes Through an Ordinary Window Pane,its Angle of Emergence