Question

whichwhich of the following conditions is not necessary for a change in the direction of propagation when a light ray goes from one medium to another?

1.the light ray must be incident at an angle greater than 0° with respect to the normal at its point of incidence.

2. the two medium must both be transparent.

3. the two medium must have different refractive indices.

4.the incident light ray must always have only the blue colour.​

Answer 1

Answer:

4.the incident light ray must always have only the blue colour.​

Explanation:

It is not necessary for a change in the direction of propagation when a light ray goes from one medium to another.