Field of View

Q. A point source of light B is placed at a distance 'L' in front of the center of a mirror of width 'd' hung vertically on a wall. A man walks in front of the mirror along a line parallel to the mirror at a distance '2L' from it as shown in the figure. The greatest distance over which he can see the image of the light source in the mirror is

1. $2d$
2. $\frac{d}{2}$
3. $d$
4. $3d$

Q. Calculate the field of view of a point object placed symmetrically at a distance 's' from a plane mirror of length 'l', (consider only the region between the mirror and a line parallel to the mirror at distance 's').

1. $infinite$
2. $\frac{ls}{2}$
3. $ls$
4. $\frac{3ls}{2}$

Q.

Figure shows an overhead view of a corridor with a plane mirror M mounted at one end. A burglar B sneaks along the corridor directly toward the center of the mirror. If d = 3.0 m, how far from the mirror will she be when the security guard S first sees her in the mirror?

1. $d$

2. $\frac{d}{2}$

3. the guard will never be able to see her

4. $\frac{3d}{2}$

Q. A point source of light B is placed at a distance L in front of the center of a mirror of width 'd' hung vertically on a wall. A man walks in front of the mirror along a line parallel to the mirror at a distance 2L from it as shown in the figure. The greatest distance over which he can see the image of the light source in the mirror is

1. 3d
2. $\frac{d}{2}$
3. 2d
4. d

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

1. $2d$
2. $3d$
3. $d/2$
4. $d$

Q. A point source of light $S$ is placed at a distance $L$ in front of the centre of plane mirror of length$\left(d\right)$. A man walks in front of the mirror along a line parallel to the mirror, at a distance $2L$ as shown below. The distance over which the man can see the image of the light source in the mirror is

1. $\frac{d}{2}$
2. $d$
3. $2d$
4. $3d$

Q. The alphabet $\text{S}$ is placed in front of a plane mirror.


Which of the following options correctly represents the image in the mirror?

1. 
2. 
3. 
4. 

Q. A boy of height $1.5\text{m}$ with eye level at $1.4\text{m}$ stands before a plane mirror of length $0.75\text{m}$ fixed on the wall. The height of the lower edge of the mirror above the floor is $0.8\text{m}$. If the boy wants to see his feet in the mirror, then select the correct option.

1. He will not be able to see his feet
2. He will be able to see his feet
3. He will be able to see his feet depend on his distance from mirror
4. Data insufficient

Q. An object $M$ is placed at a distance of $3\text{m}$ from a mirror kept at some height with its lower end at $2\text{m}$ from ground as shown in the figure. There is a person at a distance of $4\text{m}$ from the object. The ratio of minimum height and maximum height of the person required to see the image of the object will be

1. $3:4$
2. $1:2$
3. $2:3$
4. $1:3$

Q. Out of the following, Which statements are correct?
(i) two plane mirrors are inclined to each other at an angle of ${60}^0$ , if a ray of light incident on the first mirror is parallel to the second mirror, it is reflected from the second mirror parallel to the first mirror.
(ii) A bird flying high up in the air does not cast a shadow on the ground because layers of atmosphere are dense
(iii) if a ray reflected successively from two plane mirrors inclined at a certain angle undergoes a deviation of ${300}^0$, then the number of images observable is 11
(iv) A clock indicates a time of 3:25 . on seeing it in a plane mirror, the time appears as 8:35

1. (i) and (iv)
2. (ii) and (iii)
3. (i), (ii) and (iv)
4. (i), (iii)