Wave refraction: process by which the direction of approach of a wave changes as it moves into shallow water.

UNESCO: L O S S A R Y

"Light in transmission, reflection and refraction as it is perceived, " as he states on his website, inspires all of his design work.

WSJ: Robert Zimmer | Where Theory and Practice Make Perfect | Cultural Conversation by Joel Henning

The flash itself is actually a second image of the sun, caused by refraction of its light through the layer of air closest to the sea.

ECONOMIST: In a flash