Question

Which best describes what happens when light traveling through air enters water at an angle?

A. It moves along straight lines in air and changes direction when it enters water.

B. It moves in a curve in air and moves in straight lines when it enters water.

C. It moves along straight lines in air and continues along the same lines when it enters water.

D. It moves in a curve in air and continues moving in the same curve when it enters water.

Answer 1

I think it is "A'' 'It moves along straight lines in air and changes direction when it enters water.

Answer 2

The correct choice is

A. It moves along straight lines in air and changes direction when it enters water.

This is because of phenomenon of refraction which a ray of light experience when it moves from one medium to another medium. The light ray bends away from the normal to the surface if it travels from denser to rarer medium. The light ray bends towards from the normal to the surface if it travels from rarer to denser medium.