Question

A ray of light is reflected by an angle of 20° from a smooth polished surface hi what is the angle of incidence second if the angle of incidence is doubled by how much will be the reflection increase

Answer 1

Answer:

Angle of reflection=Angle of incidence

So, Angle of incidence=20°

If the angle of incidence is doubled, the angle of reflection will also get doubled.

That's 2x20°=40°

Answer 2

Answer:

1. the angle of incidence will be 20 degrees
2. the reflection angle also get doubled

Explanation:

this is the first law of reflection i.e. if the ray of light falls on a smooth reflecting surface then the angle of incidence will always be equal to angle of reflection. it will only not follow if the surface is uneven with holes and crests otherwise.