Question

Define refraction. What happens when a ray passes
a) a rarer medium to a denser medium
b) denser medium to a rarer medium​

Answer 1

Explanation:

Refraction - is the bending of a ray when it passes from one medium to another

a) rarer to denser - lowers the speed of ray

b) denser to rarer - higher the speed of ray

Answer 2

Answer:

refraction:

A change of direction that light undergoes when it enters a medium with a different density from the one through which it has been traveling — for example, when, after moving through air, it passes through a prism. (Compare reflection.)

b) When light travels from a denser medium to a rarer medium, it bends away from the normal, as illustrated to the left. This behavior follows from Snell's Law. As you saw before, the larger angle must be in the medium having the lower index of refraction.

a) just oppostite to question b