Image Formation in Concave Mirror

Q. A concave mirror of focal length 15 cm forms an image having twice the linear dimensions of the object. The position of the object when the image is virtual will be

1. 30 cm
2. 45 cm
3. 22.5 cm
4. 7.5 cm

Q. An object 5 cm tall is placed 1 m from a concave spherical mirror which has a radius of curvature of 20 cm. The height of the image is

1. 0.11 cm
2. 0.50 cm
3. 0.55 cm
4. 0.60 cm

Q. A cube of side 2 m is placed in front of a concave mirror focal length 1m with its face P at a distance of 3 m and face Q at a distance of 5 m from the mirror. The distance between the images of face P and Q and height of images of P and Q are

1. 0.25 m, 1m, 0.5 m
2. 0.5 m, 1 m, 0.25 m
3. 1 m, 0.5 m, 0.25 m
4. 0.5 m, 0.25 m, 1m

Q.

In which of the following cases, the rays after reflection from a concave mirror diverge:

1. When the object is place at infinity
   

2. When the object is placed between center of curvature and the focus

3. When the object is placed between focus and the pole

4. Never. Concave mirror is a converging mirror.

Q.

For a concave mirror, if real image is formed the graph between is of the form

1. 
2. 
3. 
4. 

Q. A concave mirror of focal length 100 cm is used to obtain the image of the sun which subtends an angle of 30'. The diameter of the image of the sun will be

1. 1.74 cm
2. 0.87 cm
3. 0.435 cm
4. 100 cm

Q.

An object 5cm tall is placed 1m from a concave spherical mirror which has a radius of curvature of 20cm The size of the image is

1. 0.11cm
2. 0.50cm

3. 0.55cm

4. 0.60cm

Q.

The focal length of a concave mirror is 50 cm. Where an object be placed so that its image is two times and inverted?

1. 63 cm
2. 75 cm

3. 72 cm

4. 50 cm

Q. A person sees his virtual image by holding a mirror very close to the face. When he moves the mirror away from his face, the image becomes inverted. What type of mirror he is using

1. Plane mirror
2. Convex mirror
3. Concave mirror
4. None of these

Q. A candle flame 3 cm is placed at distance of 3 m from a wall. How far from wall must a concave mirror be placed in order that it may form an image of flame 9 cm high on the wall

1. 225 cm
2. 300 cm
3. 650 cm
4. 450 cm