Image Formation by a Point Object

Q.

The distance between the object and its image formed by a plane mirror appears to be $24cm$. What is the distance between the mirror and the object?

Q. Which of the following is correct about the law of reflection?

1. The law of reflection is valid only for smooth surfaces.

2. The law of reflection is valid for all surfaces.

3. The law of reflection is valid only for uneven surfaces.

4. Angle of incidence = Angle of reflection

Q.

According to law of reflection, How this statement(angle of incidence = angle of reflection= 90 degree) is correct? how both equal to 90 or 0 degree?

Q.

Q. Which of the following is incorrect ?

a. A convex mirror can give a virtual image.

b. A convex mirror cannot give a real image.

c. A concave mirror can give a virtual image.

d. A concave mirror can give a diminished virtual image.

Q.

What is infinity in mirrors?

Q.

How many images of a candle will be formed if it is placed between two parallel plane mirrors separated by 50 cm?

1. Single image

2. Two images

3. Infinite images

4. Fifty images

Q. A magnified virtual image can be produced by a ______.

1. convex mirror
2. prism
3. plane mirror
4. concave mirror

Q.

If an object is placed at a distance of $0.5m$ in front of a plane mirror, the distance between the object and the image formed by the mirror will be

1. $2m$

2. $1m$

3. $0.5m$

4. $0.25m$

Q.

Why is it so that if you can see another person in a mirror, he/she can also see you?

Q. A plane mirror of length $8$cm is moving with speed $3m/s$ towards a wall in situation as shown in figure. Size of spot formed on the wall is $32/x$cm. Find the value of x.

Q. Two plane mirrors are inclined at angle $\theta$. An optical ray $AB$ is incident on a mirror at an angle $2\theta$ with the mirror, as shown. The reflected ray from the second mirror, $CD$ is perpendicular to the incident ray. Find angle $q$-

Q.

Monika, $145$cm tall stood at a distance of $2$ m away from a plane mirror.

a. What is the distance between Monika and her image?
b. What will be the height of Monika’s image?
c. What will be the distance between Monika and her image if she walks a distance of $1$m towards the mirror?

Q. sir /Mam can you please explain me what is the O in the concave convex mirror that we use

Q. The total number of images formed by two plane mirrors, inclined at an angle of ${112.5}^{o}C$, and an object lying symmetrically is

1. 3
2. 4
3. 2
4. 3, 2

Q.

If 3 concave mirrors are cut from a sphere and put in the given set up and if the sun lies on the principle axis of mirror 2 at infinity, then at what position will the images of the sun be formed by three mirrors?

1. At F₁, F₂& F₃

2. At C

3. At P₁, P₂& P₃

4. At F₂ only

Q. State the characteristics of an image formed by a plane mirror.(5 marks)

Q. Two plane mirror are inclined at an angle of ${72}^o$. The number of images of a point object placed between them will be

1. $3$
2. $2$
3. $5$
4. $4$

Q. Which of the following are characteristics of images formed by convex mirrors?

1. Inverted
2. Point sized
3. Erect
4. Real

Q. An object $1m$ tall is in front of a plane mirror at a distance of $0.2m$. The size of the image formed is:

1. $0.2m$
2. $0.5m$
3. $0.1m$
4. $1m$

Q. In the given diagram, where will you find the image of the pencil?

1. D
2. A
3. B
4. C

Q. A person's eye level is 1.5 m. He stands in front of a 0.3 m long plane mirror which is 0.8 m above the ground. The height of the image he sees of himself is:

1. 1.5 m
2. 1.0 m
3. 0.8 m
4. 0.6 m

Q. You hold a plane mirror 1.0 m in front of your eyes and are able to see a 15 m high tree behind you If the mirror is 20.0 cm high, and the tree image completely fills the mirror how fare are you standing from the tree ?

1. $50m$
2. $74m$
3. $100m$
4. $25m$

Q.

A and B are parallel rays. Complete the figure and find the angle of incidence on mirror X and the angle of reflection for the ray on mirror Y

Q. In the given diagram, where will you find the image of the pencil?

Q. A pencil of light rays falls on a plane mirror and form a real image, so the incident rays are:

1. parallel
2. diverging
3. converging
4. statement is false

Q. The diagram above shows an object XY in front of a plane mirror $M{M}_1$ . Draw the diagram, path of two rays from each point X and Y of the object to show the formation of its image.

Q. How many images of an object will be formed when the object is placed between teo plane mirrors who are inclined at the following angles to one another?

1. ${45}^0$
2. ${120}^0$
3. ${60}^0$
4. ${90}^0$
5. ${180}^0$

Q. A body is $1.8m$ tall and can see his image in plane mirror fixed on a wall. His eyes are $1.6m$ from floor level. The minimum length of the mirror to see his full images is:-

1. $0.9m$
2. $0.85m$
3. $0.8m$
4. Can't be determined

Q. A man of height $H$ is standing in font of a mirror, which has been fixed on the ground. What length of his body can the man see in the mirror? The length of the mirror is $\frac{H}{2}$. (Neglect separation between eyes and head of men)

1. $H$
2. $\frac{H^2}{{(H^2+L^2)}^{\frac{1}{2}}}$
3. Zero
4. $\frac{Z{H}^2}{L}$

Q. If an object moves towards a plane mirror with speed '$v$' then:

1. The image moves towards the mirror with a speed $v$
2. The image moves away from the mirror with a speed $v$
3. The image moves towards the mirror with a speed $2v$
4. The image moves away from the mirror with a speed $2v$