What is angle between wavefront and ray light?

Define wavefront and a ray.

A ray of light is incident on a medium at polarising angle .What is the angle betweeen the relfected and refracted rays?

What is a ray of light?

What is a ray of light?

Define the wavefront of light.

Define the wavefront of light.

What is the shape of the wavefront in each of the following cases: The portion of the wavefront of light from a distant star intercepted by the Earth.