Characteristics of Image by a Plane Mirror

Q.

If an object moves 5 m/sec towards the mirror and the mirror also moves with speed 5 m/sec towards the object, then the velocity by which image will move towards the mirror is

1. 25 m/s, towards the mirror

2. 15 m/s, towards the mirror

3. 5 m/s, towards the mirror

4. 10 m/s, towards the mirror

Q. What is virtual and real image?

Q.

If you stand 3 m in front of a plane mirror, how far away would you see yourself in the mirror?

1. 1 m

2. 2 m

3. 3 m

4. 6 m

Q.

A child is standing in front of a magic mirror. She finds the image of her head bigger, the middle portion of her body of the same size and that of the legs smaller. The following is the order of combinations for the magic mirror from the top.

1. Plane, convex and concave

2. Convex, concave and plane

3. Concave, plane and convex

4. Convex, plane and concave

Q. Match the following:

(A) Plane mirror	(1) Always virtual, erect and dimnished image
(B) Convex mirror	(2) Image is erect and of the same size as the object
(C) Convex lens	(3) Used by dentists to see enlarged images of teeth
(D) Concave mirror	(4) Used in microscope.

1. (A)-1, (B)-2, (C)-3, (D)-4
2. (A)-3, (B)-1, (C)-2, (D)-4
3. (A)-1, (B)-2, (C)-4, (D)-3
4. (A)-2, (B)-1, (C)-4, (D)-3

Q.

Rays parallel to the principal axis of a concave or a convex mirror meet or appear to come from which point respectively?

1. Centre of curvature

2. Pole

3. Focus

4. At a point in the middle of the centre of curvature and focus

Q. A boy is standing in front of a plane mirror at a distance of 3 m from it. Then the distance between the boy and his image is:

1. 3 m

2. 6 m

3. 1.5 m

4. 9 m

Q. A boy is observing his image in a plane mirror. The distance between the mirror and his image is 6 m. If he moves 2 m towards the mirror, then the distance between the boy and his image will be ___ m.

Q.

You are standing at a distance 2 metre from a plane mirror

1.What is the distance of your image from the mirror?

2.What is the distance between you and your image?

Q.

Image formed by a ____________ mirror is always of the same size as the object.

1. convex

2. concave

3. spherical

4. plane

Q.

What kind of mirrors are used for examining the ear, nose, throat and teeth in the hospital?

Q.

A boy is observing his image in a plane mirror. The distance between the mirror and his image is 6 $m$. If he moves 2 $m$ towards the mirror, then the distance between the boy and his image will be:

1. 8 $m$

2. 4 $m$

3. 6 $m$

4. 2 $m$

Q. A person is moving towards a plane mirror at a speed of 2 m/s. What will be the speed of his image with respect to the mirror?

1. 2 m/s
2. 4 m/s
3. 6 m/s
4. 8 m/s

Q. An object is kept at 5 m in front of a plane mirror. What is distance between image and mirror?

1. 5 cm
2. 10 m
3. 10 cm
4. 5 m

Q.

What happens when light hits a concave mirror?

Q.

Which mirror is used by the dentist?

Q. A particle moves perpendicular towards a plane mirror with constant speed 4 cm/s. What is the speed of the image observed by an observer moving along the same direction with constant speed 2 cm/s if the mirror is moving in opposite direction with speed 10 cm/s ? 1 4cm/ 2 12cm/s 3 14cm/s 4 26cm/s Assume that all the speeds are with respect to ground frame.

Q. Alex is standing 5 m from a plane mirror. He moves 2 m towards the mirror. How far is he standing from his image now?

1. 2 m
2. 5 m
3. 6 m
4. 3 m

Q.

The distance between a plane mirror and an object is not always equal to the distance between the image and the mirror.

1. True
2. False

Q. An object is 1 m away from a plane mirror. The distance between the object and its image is:

1. 1.0 m
2. 2.0 m
3. 0.75 m
4. 0.5 m

Q. An object at a distance of 2 m from a plane mirror forms an image at a distance offrom the mirror.

1. 1 m
2. 2 m
3. 0 m
4. 4 m

Q. A person is moving towards a plane mirror at a speed of 2 m/s. What will be the speed of his image with respect to the mirror?

1. 2 m/s
2. 4 m/s
3. 6 m/s
4. 8 m/s

Q.

What is the focal length of a plane mirror?

1. f = 1

2. f = 0

3. cannot be said

4. focal length is infinity

Q. The height of the image formed by a plane mirror isthat of the object.

1. greater than
2. lesser than
3. equal to

Q. A boy is standing in front of a plane mirror at a distance of 3 m from it. Then the distance between the boy and his image is:

1. 9 m

2. 3 m

3. 6 m

4. 1.5 m

Q.

The distance between a plane mirror and an object is not always equal to the distance between the image and the mirror.

1. True
2. False

Q. An object is moving with a speed of 2m/s towards a mirror. with what speed will the image and the object come close to each other.

Q. A plane mirror and an object approach each other with speeds of 5 m/s and 10 m/s respectively. The speed of the image will be:

1. 5 m/s
2. 15 m/s
3. 20 m/s
4. 25 m/s

Q.

If a child crawls towards a mirror at a rate of 0.25 m/s, then at what speed will the child and the child s image approach each other?

Select one: a. 0.25 m/s b.0.50 m/s c. 0.125 m/s d. 1 m/s

Q.

Which amongst the following is not a characteristic of an image formed by a plane mirror?

1. Erect
2. Virtual
3. Diminished
4. Laterally inverted