Grade 8 CBSE Light Quiz

The perpendicular drawn to the reflecting surface is called

• reflected ray

• dispersion

• incident ray

• normal

If two plane mirrors are inclined at an angle of 40°, number of images formed will be

• 9

• 8

• 6

• 5

Band of seven colours is called

• spectrum

• dispersion

• VIBGYOR

• reflection

Two mirrors A and B are placed at right angles to each other. A ray of light incident on mirror A at an angle of 25° falls on mirror B after reflection. The angle of reflection for the ray reflected from mirror B would be

• 25°

• 50⁰

• 115°

• 65°

A toy is placed at 10 cm in front of a plane mirror. What is the distance of image from the mirror?

• 10 cm

• 15 cm

• 30 cm

• 20 cm

The angle between the reflected ray and the normal at the point of incidence is called angle of incidence.

• True

• False

In mirror, the size of the image is the same as the size of the object.

• True

• False

Real images are formed on the screen.

• True

• False

• Maybe

Rods are sensitive to bright light.

• False

• True

In bright light the size of the pupil is smaller.

• True

• False