Question

Suggest two conditions under which no change in direction of propagation of light ray would take place when it passes form one medium to another

Answer 1

Answer:

Two conditions are:-

1. If the refractive indices of two

media is equal.

2. If it falls normally on the surface separating the two media.

Please mark it BRAINLIEST

Answer 2

When i = 0

Explanation:

When the incident ray follows the normal drawn perpendicularly on the junction plane of 2 mediums, there is no refraction.

In the above scenario, the angle of incidence i becomes zero. That is the angle between the incident ray and the normal is 0. When i = 0, angle of refraction 'r' is also zero. That is the angle between the refracted ray and the normal is 0. Thus no change in direction occurs.