Question

A ray of light incident on mirror 1 at an angle of 60 degree falls on mirror 2 after reflection. Draw and show the angle of reflection for the ray reflected from mirror 2.

Answer 1

Explanation:

The angle of deviation in a plane mirror is calculated as δ=(180

o

−2

In this case, the angle of deviation is given as 60

o

.

Substituting in the above equation we get, 60

o

=(180

o

−2

So, i=60

o

According to the law of reflection, the angle of incidence equals the angle of reflection.

Therefore, angle of incidence i = angle of reflection r = 60

o

Answer 2

Explanation:

Correct option is B 60

The angle of deviation in a plane mirror is calculated as δ=(180 −2i)

In this case, the angle of deviation is given as 60

Substituting in the above equation we get, 60=(180 −2i).

So, i=60

According to the law of reflection, the angle of incidence equals the angle of reflection.

Therefore, angle of incidence i = angle of reflection r = 60