Convex Mirrors

Q. An object is placed in front of a convex mirror at $60m$ from the mirror. Its radius of curvature is $40m$. The object starts moving towards the mirror at $20m{s}^{-1}$. Find the average speed of the image after a time interval of 2 seconds?

1. $10m{s}^{-1}$
2. $20m{s}^{-1}$
3. $2.5m{s}^{-1}$
4. $5m{s}^{-1}$

Q. How will you distinguish between a plane mirror, concave mirror and a convex mirror, without touching them?

Q. In a convex mirror, reflections takes place at the _________.

1. plane surface
2. bent in surface
3. bulged out surface
4. both bent in and bulge out surface

Q. Which of the following mirror has the widest field of view?

1. Plane mirror
2. Plane and concave mirror
3. Convex mirror
4. Concave mirror

Q. Which of the following is not an application of a convex mirror?

1. Shaving mirrors
2. Rear view mirrors of vehicles
3. Sunglasses
4. Security glass in ATM to see who is behind

Q. An object 4 cm high is placed at a distance of 10 cm from a convex mirror of radius of curvature 30 cm. Find the image distance.

1. 10 cm
2. - 4 cm
3. 6 cm
4. - 5 cm

Q.

Consider the following statements:

I) Dentists use convex mirrors.

II) Automobiles use concave mirrors as the rear view mirrors.

III) In a convex mirror, the reflecting surface is bulging out.

IV) In a concave mirror, the reflecting surface is bulging in.

Choose the correct option.

1. Statements I and II are correct.

2. Statements I, II, III and IV are correct.

3. Statements III and IV are correct.

4. Statements I and III are correct.

Q. Question 8 (b)
Name the type of mirror used in the given situation.
Side/rear-view mirror of a vehicle
Support your answer with reason.

Q.

A diminished virtual image can be formed only in

1. Concave mirror

2. Convex mirror

3. Plane mirror

4. Concave-parabolic Mirror

Q.

Which of the following mirrors has a larger field of view?

1. 

2. 

3. 

4. 

Q.

Which mirror is used as the rear-view mirror in vehicles? [1 MARK]

Q. How will you distinguish between a plane mirror, concave mirror and a convex mirror, without touching them?

Q. Pick the mirror with the widest field of view.

1. Convex mirror
2. Concave mirror
3. Cylindrical mirror
4. Plane mirror

Q.

Convex mirrors are used as rear view mirrors?

1. Concave

2. Plain

Q. Choose the wrong statement

1. A concave mirror can be used to concentrate the incident rays at a particular point.
2. A concave mirror can form a magnified virtual image.
3. A convex mirror can be used to concentrate the incident rays at a particular point.
4. A convex mirror can form an enlarged virtual image.

Q.

Convex mirror is also known as a divergent mirror.

1. True

2. False

Q.

Convex mirrors are used as rear view mirrors?

1. True

2. False

Q. Convex mirrors produce virtual images only.

1. False
2. True

Q. Which of the following mirror can form a full size virtual image, if the aperture of the mirror is small?

1. concave mirror

2. plane mirror

3. a combination of concave and plane mirror

4. a convex mirror

Q. Pick the mirror with the widest field of view.

1. Cylindrical mirror
2. Concave mirror
3. Convex mirror
4. Plane mirror

Q. Side mirrors in vehicles are ___________.

1. plane mirrors
2. concave mirrors
3. parabolic mirrors
4. convex mirrors

Q. If the image formed by a mirror is upright and diminished irrespective of the distance between the object and the mirror, what can you say about the type of mirror?

1. Convex mirror
2. Concave mirror
3. Plane mirror
4. Can’t say

Q. Which of the following mirror can form a full size virtual image, if the aperture of the mirror is small?

1. Concave mirror
2. Plane mirror
3. A combination of concave and a plane mirror
4. A convex mirror