Question

why light waves are refracted at a boundary between two materials​

Answer 1

Answer:

. Light waves change speed when they pass across the boundary between two substances with a different density , such as air and glass. This causes them to change direction, an effect called refraction . ... the light slows down going into a denser substance, and the ray bends towards the normal

Answer 2

Answer:REFLECTION

Explanation: Light waves change speed when they pass across the boundary between two substances with a different density , such as air and glass. This causes them to change direction, an effect called refraction . The light slows down going into a denser substance, and the ray bends towards the normal.