Question

Two mirrors are inclined at an angle 30.if a ray of light incident on the first mirror the deviations after two reflections is?​

Answer 1

Answer:

your ans is

Explanation:

Diagram: 2 Marks

Problem: 3 Marks

img

If

d

1

and

d

2

are the deviations suffered at

M

1

and

M

2

respectively.

Then

d

1

= π – 2i and

d

2

= π – 2i`

Total deviation d = 2π – 2(i + i`)

From triangle OAB, θ +

π

2

- i` +

π

2

– i = π or θ = i` + i

Therefore d = 2π - 2θ

Thus the total deviation is independent of angle of incidence.