You visited us 1 times! Enjoying our articles? Unlock Full Access!

Byju's Answer

Standard IX

Physics

Images Formed by a Pair of Plane Mirrors

Two mirrors M...

Question

Two mirrors $M_{1}$ and $M_{2}$ are inclined at angle $θ$ as shown. A ray of light which is parallel to $M_{2}$ strikes $M_{1}$ and then strikes mirror $M_{2}$ . After that it retraces its own path. Find $θ$ .

90^{\circ}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

45^{\circ}

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

60^{\circ}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

30^{\circ}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B $45^{\circ}$
To retrace its own path, the ray has to strike mirror $M_{2}$ perpendicularly.

From the ray diagram
$2 θ = 90^{\circ}$
$θ = 45^{\circ}$

Suggest Corrections

Similar questions

Two plane mirrors $M_{1}$ and $M_{2}$ are inclined at angle as shown in fig. A ray of light $1$ , which is parallel $M_{1}$ , strikes $M_{2}$ and after two reflections, ray 2 becomes parallel to $M_{2}$ Find the angle $θ$

Q. Two place mirrors are inclined at an angle by

120^{o}

, as the figure shows. If a ray strikes mirror

M_{1}

, at a

65^{o}

angle of incidence, at what angle

θ

does it leave mirror

M_{2}

Q. Two plane mirrors

M_{1}

and

M_{2}

are inclined to each other at

70^{\circ} .

A ray incident on the mirror

M_{1}

at an angle

θ

falls on

M_{2}

and is then reflected parallel to M, for

Q. Two plane mirrors are inclined at an angle

θ

as shown in the figure. Find the value of

θ

such that the light ray retraces its path after second reflection.

The plane mirrors $M_{1}$ and $M_{2}$ are inclined to each other such that a ray of light incident on mirror $M_{1}$ and parallel to the mirror $M_{2}$ is reflected from mirror $M_{2}$ parallel to the mirror $M_{1}$ . The angle between the two mirror is (in degrees)

Join BYJU'S Learning Program

Two mirrors M1 and M2 are inclined at angle θ as shown. A ray of light which is parallel to M2 strikes M1 and then strikes mirror M2. After that it retraces its own path. Find θ.

The correct option is B 45∘To retrace its own path, the ray has to strike mirror M2 perpendicularly. From the ray diagram 2θ=90∘ θ=45∘

Two mirrors $M_{1}$ and $M_{2}$ are inclined at angle $θ$ as shown. A ray of light which is parallel to $M_{2}$ strikes $M_{1}$ and then strikes mirror $M_{2}$ . After that it retraces its own path. Find $θ$ .

The correct option is B $45^{\circ}$
To retrace its own path, the ray has to strike mirror $M_{2}$ perpendicularly.

From the ray diagram
$2 θ = 90^{\circ}$
$θ = 45^{\circ}$