Crepuscular rays
Magnificent beams of light that radiate from the sun, shining through clouds, mountains or buildings are called crepuscular rays. Crepuscular refers to twilight and very often this effect can be witnessed during sunrise or sunset. Although these rays appear to converge towards the sun or diverge from it, they are actually parallel to each other. It is a visual illusion similar to that of railroad tracks that seem to converge in the distance.
