Image formed by Concave Mirror

Q. If an object is placed at the centre of curvature of a concave mirror, the image formed will be

1. of same size.
2. inverted.
3. real.
4. magnified.

Q.

To obtain a real, inverted and highly enlarged image, choose the suitable type of mirror and the position of object in front of it.

1. Type of mirror: concave mirror,
   Position of object: At focus

2. Type of mirror: Convex mirror,
   Position of object: At focus point

3. Type of mirror: concave mirror,
   Position of object: Beyond centre of curvature

4. Type of mirror: concave mirror,
   Position of object: At centre of curvature

Q. Incident ray starting or passing through the focus of a concave mirror travels parallel to its principal axis after reflection.

1. True
2. False

Q. The point at which all rays coming parallel to the principal axis converge is called as

1. pole.
2. diverging point.
3. focal point.
4. center of curvature.

Q.

The mirror used as a rear view mirror is ___

Q.

What is the focal length of a plane mirror?

1. 0

2. 

3. 25 m

4. 25 cm

Q. 20.An object is placed at the focus of a convex mirror.If its focal length is 20 cm, the distance of mirror is

Q. On what factors does the focal length of a spherical mirror depends ?

Q.

Try matching the object positions to the right image positions for a concave mirror.

1. At the focus F
2. Beyond C
3. Between F and C
4. At infinity

Q. Choose the ray diagram which shows the image formation for object placed at center of curvature of concave mirror.

1. 

2. 

3. 

4. 
   

Q.

The radius of curvature of a concave mirror is 10 cm. If I want to capture the image of the sun, at what distance from the pole of the mirror would an image be formed?

1. 5 cm

2. 10 cm

3. At infinity

4. 20 cm

Q.

Which of the following points falls on the principal axis?

1. Pole

2. Centre of curvature

3. Focus

4. Aperture

Q. Incident ray starting or passing through the focus of a concave mirror travels parallel to its principal axis after reflection.

1. True
2. False

Q.

How will the magnitude of magnification change if an object placed at center of curvature is moved towards focus in concave mirror?

1. It decreases

2. It increases

3. It remains constant

4. It becomes equal to infinity

Q. A person standing in front of a mirror finds his image erect and larger than himself. This implies that the mirror is ___.

1. concave
2. cylindrical with bulging side outwards
3. plane
4. convex

Q.

The minimum distance between the object and the image formed by a concave mirror when the object is placed at C is equal to ___.

1. zero

2. F

3. 2F

4. F/2

Q. Any spherical mirror never forms an image of equal size as that of the object.

1. True
2. False

Q. A boy runs from infinity to the pole of a concave mirror. Sort the position of image with the earliest at the top.

1. At focus
2. Between C and F
3. At infinity
4. Behind the mirror

Q.

An object is placed in front of a convex mirror of radius of curvature $40\mathrm{cm}$ at a distance of $10\mathrm{cm}$. Find the position and nature of the image.

Q. Prove focal length= 1/2of radius OS Spherical mirror