Field of View

Q.

What type of mirror is used as a side-view mirror in a car?

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. 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. 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. An object is placed in front of a concave mirror of focal length $f$. A virtual image is formed with a magnification of 2. To obtain a real image of same magnification, the object has to moved by a distance

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

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 concave mirror produces a real image of magnification 1/2, when an object is placed at a distance of 60cm from it.Where should be the object placed so that a virtual image which is twice the size of the object is formed by thope mirror?

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. 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.

An erect and enlarged image of an object is formed on a screen. Explain how this could be possible.

Q. If time in object clock placed in front of plane mirror is $1:15$ then time in image clock will be
(correct answer + 1, wrong answer - 0.25)

1. $10:45$
2. $1:15$
3. $11:45$
4. None of these

Q.

If a mirror forms a virtual, erect image of the same size as the object, then

1. It should be a convex mirror

2. it should be a spherical mirror

3. it should be a plane mirror

4. it should be a combination of plane and spherical mirror

Q. Figure shows a concave mirror of focal length $20\text{cm}$. A point object on the principal axis at a distance of $30\text{cm}$ from the pole starts moving perpendicular to the principal axis and its position time relation is given by $y=(3t^2+4t)\text{cm/s}$. The speed of the image at $t=1\text{s}$ will be :

1. $15\text{cm/s}$
2. $18\text{cm/s}$
3. $20\text{cm/s}$
4. $12\text{cm/s}$

Q. A square of side 3cm is located at a distance 25 cm from a concave mirror of focal length 10cm. The centre of square is at the axis of the mirror and the plane is normal to axis of mirror. The area enclosed by the image of the square is:

1. $4c{m}^2$
2. $6c{m}^2$
3. $16c{m}^2$
4. $36c{m}^2$

Q. Two plane mirrors are inclined to one another at an angle of ${60}^{\circ }$. A point object is placed symmetrically between them. If a distance of the object from vertex is $8cm$ then, find the distance between the respective first images formed in both mirrors.

1. $16cm$
2. $24cm$
3. $\frac{8}{\sqrt{3}}cm$
4. $8\sqrt{3}cm$

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 linear thin rod of length $\frac{f}{3}$ is placed along the optical axis of a concave mirror of focal length $f$ such that its image which is real and elongated just touches the rod. Find the magnification.

1. $\frac{3}{2}$
2. $2$
3. $\frac{5}{2}$
4. $3$

Q.

What is the minimum length of a plane mirror required for a person to see his or her full image?

Q.

The image formed by a plane mirror can be projected onto a screen. Do you agree? Give reason.

Q.

Mention the characteristics of the image of an object in a plane mirror.

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. Draw a ray diagram for concave mirror when object is placed between focus and centre of curvature. Also write position, nature and size of image.

Q. When a ray of light strikes a plane mirror at an angle of ${15}^{\circ }$ with the mirror, what will be the angle of reflection with respect to the normal?

1. ${15}^{\circ }$
2. ${30}^{\circ }$
3. ${75}^{\circ }$
4. None of these

Q. 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 $2L$ as shown below. The distance over which the man can see the image of the light source in the mirror is :

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

Q.

Find the nature of the mirror if your image in it always appears erect and of the same size.

Q.

The imaginary line perpendicular to the mirror at the point of incidence is called _______.

Q. When a plane mirror is placed horizontally on a level ground at a distance of 60 meters from the foot of a tower, the angle between the incident ray from the top of the tower and horizontal is ${45}^{\circ }$. Then height of the tower is

1. 40 m
2. 60 m
3. 48 m
4. 22 m

Q. A man standing at a distance of $1$ metre from a mirror wishes to take the photograph of his image in the mirror. At what distance should he place his camera from the mirror?

1. $4$ metre
2. $0.5$ metre
3. $2$ metre
4. $1$ metre

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. $3d$
4. $2d$

Q.

How does a real image differ from a virtual image?