REFLECTION BY PLANE MIRROR

The reason we are able to see object is......

• reflection

• refraction

• diffraction

• polarization

A virtual image is one

• that is inverted

• that is blur

• in which there is no actual interception of light rays

• that can be formed on a screen

A light ray is incident on a plane mirror at angle of 45 degrees. What is the angle between the incident ray and the reflected ray

• 65 degrees

• 180 degrees

• 45 degrees

• 90 degrees

The incident ray, the reflected ray and the normal at the point of incidence all lie in the same plane. This is

• known as snell's law

• the only law of reflection

• one of the laws of reflection

• the law of refraction

When a light ray travels from water to air, which of the following is correct?

• n1 is the refractive index of water

• n2 is the refractive index of air

• The refractive index of air is approximately 1

• All of the above

Two plane mirrors are inclined at an angle of 120 degrees to each other, the number of images formed is.....

• 2

• 3

• 4

• infinity

An object is placed between two parallel plane mirrors. How many images can be formed?

• 0

• 3

• 4

• infinity

A man standing 10 m from a looking glass sees an image of himself. What is the distance between him and his image?

• 10 m

• 20 m

• 5 m

• 40 m

The two plane mirrors in a periscope are

• inclined at angle 45 degrees backing each other

• inclined at angle 60 degrees facing each other

• inclined at angle 45 degrees facing each other

• inclined at angle 60 degrees backing each other

When parallel rays of light incident on a rough or irregular surface are reflected in various direction, the type of reflection obtained is .... reflection

• regular

• diffuse

• scattered

• all of the above