Plane Mirror

Interactive Feed

LEVELJEE Main

Two plane mirrors $A$ and $B$ are aligned parallel to each other, as shown in the figure. A light ray is incident at an angle $3 0^{\circ}$ at a point just inside one end of $A$ . The plane of incidence coincides with the plane of the figure. The maximum number of times the ray undergoes reflections (including the first one) before it emerges out is

A ray of light travelling in the direction $\frac{1}{2} (\hat{i} + 3 \hat{j})$ is incident on a plane mirror. After reflection, it travels along the direction $\frac{1}{2} (\hat{i} - 3 \hat{j})$ . The angle of incidence is

A point source of light $S$ , placed at a distance $L$ in front of the centre of a plane mirror of width $d$ , hangs vertically on a wall. A man walks in front of the mirror along a line parallel to the mirror at a distance $2 L$ from it as shown. The greatest distance over which he can see the image of the light source in the mirror is

(A)

d /2

(B)

d

(C)

2 d

(D)

3 d

JEE Advanced 2022

LEVELJEE Advanced

Three plane mirrors form an equilateral triangle with each side of length L. There is a small hole at a distance $l > 0$ from one of the corners as shown in the figure. A ray of light is passed through the hole at an angle $θ$ and can only come out through the same hole. The cross section of the mirror configuration and the ray of light lie on the same plane.

* Multiple Correct Options

(A)

The ray of light will come out for

θ = 3 0^{\circ}

, for

0 < l < L

(B)

There is an angle for

l = \frac{L}{2}

at which the ray of light will come out after two reflections.

(C)

The ray of light will NEVER come out for

θ = 6 0^{\circ}

and

l = \frac{L}{3}

(D)

The ray of light will come out for

θ = 6 0^{\circ}

, and

0 < l < \frac{L}{2}

after six reflections.

JEE Main 2019

LEVELJEE Advanced

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

(A)

4 5^{\circ}

(B)

7 5^{\circ}

(C)

9 0^{\circ}

(D)

6 0^{\circ}

JEE Main 2021

LEVELJEE Main

A point source of light $S$ , placed at a distance $60 cm$ in front of the centre of a plane mirror of width $50 cm$ , hangs vertically on a wall. A man walks in front of the mirror along a line parallel to the mirror at a distance $1.2 m$ from it (see in the figure). The distance between the extreme points, where he can see the image of the light source in the mirror is .......... cm.

LEVELBoard

To get three images of a single object, one should have two plane mirrors at an angle of

(A)

6 0^{\circ}

(B)

9 0^{\circ}

(C)

12 0^{\circ}

(D)

3 0^{\circ}

LEVELJEE Main

If two mirrors are kept at $6 0^{\circ}$ to each other, then the number of images formed by them is

Two plane mirrors $M_{1}$ and $M_{2}$ are at right angle to each other shown. A point source $P$ is placed at $a$ and $2 a$ meter away from $M_{1}$ and $M_{2}$ , respectively. The shortest distance between the images thus formed is (Take $5 = 2.3$ )

(A)

3 a

(B)

4.6 a

(C)

2.3 a

(D)

210 a

JEE Main 2019

LEVELJEE Main

A point source of light, $S$ is placed at a distance $L$ in front of the centre of plane mirror of width $d$ which is hanging vertically on a wall. A man walks in front of the mirror along a line parallel to the mirror, at a distance $2 L$ as shown below. The distance over which the man can see the image of the light source in the mirror is

(A)

\frac{d}{2}

(B)

d

(C)

3 d

(D)

2 d

To get three images of a single object, one should have two plane mirrors at an angle of

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } If two mirrors are kept at 60∘ to each other, then the number of images formed by them is

If two mirrors are kept at $6 0^{\circ}$ to each other, then the number of images formed by them is