TEST SERIES - 63 (II)

The focal length of a plane mirror is

• Positive

• Negative

• Zero

• Infinite

A ray of light incident on a plane mirror at angle . If the angle between the incident and reflected rays is 80°, what is the value of angle?

• 40°

• 50°

• 45°

• 55°

If a ray of light incident on a plane mirror is such that it makes an angle of 30° with the mirror, then the angle of reflection is

• 30°

• 45°

• 55°

• 60°

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

• 3 m

• 6 m

• 4.5 m

• None of these

The amount of light reflected depends upon

• The nature of material of the object

• The nature of the surface

• The smoothness of the surface

• All of the above are correct

An observer moves towards a plane mirror with a speed of 2 m/s. The speed of the image with respect to the observer is

• 1 m/s

• 2 m/s

• 4 m/s

• 8 m/s

A plane mirror reflects a beam of light to form a real image. The incident beam is

• Parallel

• Convergent

• Divergent

• Any one of the above

A man of height 1.4 m wishes to see his full image in a plane mirror placed at distance of 2 m. The minimum height of the mirror should be

• 0.5 m

• 0.7 m

• 0.9 m

• None of these

A toy is placed between two plane mirrors inclined at angle of 60°. The number of images formed is

• 5

• 6

• 4

• 3

Mirage is observed in a desert due to the phenomenon of

• Interference

• Total reflection

• Scattering

• Double refraction