Question

If the angle of incidence is 45 degree, then the angle between the reflected ray and the incident ray is what ?

Answer 1

Answer:

90°

Explanation:

i=r

I+r=45+45=90°

Answer 2

Answer:  90 degree

Explanation:

According to the first law of reflection of light, if the angle of incidence is 45 degree then the angle between reflected ray and the incident ray will be 90 degree.

Because Angle of incidence = Angle of reflection

So, Angle between them = Angle of incidence + Angle of reflection

                                          = 45 + 45

                                          = 90 degree

First law of reflection:

The first law of reflection stated that, Angle formed by incident ray on the normal point of incident is equal to the angle formed after the reflection of incident ray from surface.

i.e. ∠i = ∠r