Question

What conditions cause light to bend?

Answer 1

The Cause of Refraction.

Refraction is merely one of several possible boundary behaviors by which a light wave could behave when it encounters a new medium or an obstacle in its path.

Answer 2

The Cause of Refraction. We have learned that refraction occurs as light passes across the boundary between two media. Refractionis merely one of several possible boundary behaviors by which a light wave could behave when it encounters a new medium or an obstacle in its path.