Light

Light Worksheet-1

1. The surfaces which cannot produce clear images are called:

(a) rough surfaces                        (b) ideal surfaces

(c) smooth surfaces                     (d) curved surfaces

2. In order to be used as mirrors, glasses are coated with:

(a) Silver            (b) Copper         (c) Aluminium (d) Platinum

3. We are able to see objects because:

(a) they absorb light

(b) they reflect light

Light Worksheet-2

1. When the angle between two plane mirrors is 60°, how many multiple images will be formed by the mirrors?

(a) 5                    (b) 6                    (c) 7                    (d) 8

2. If the angle of incidence is 50°, then calculate the angle between the incidence ray and the reflected ray.

(a) 50°                (b) 100°             (c) 130°              (d) 80°

Light Worksheet-3

1. In a periscope, the reflecting mirrors will be:

(a) perpendicular to each other

(b) parallel to each other

(c) at an angle of 45°

(d) at an angle of 60°

2. The nature of image formed on the retina of human eye is:

(a) virtual and erect                     (b) virtual and inverted

(c) real and erect                          (d) real and inverted