Question

What caused light to appear bent when it refracts ?

Answer 1

Answer:

Light refracts whenever it travels at an angle into a substance with a different refractive index (optical density). This change of direction is caused by a change in speed. ... When light enters a more dense substance (higher refractive index), it 'bends' more towards the normal line.

Answer 2

Answer: I think C. When light enters a different medium, it travels at a different speed.

Explanation: sorry if I’m wrong!