Light Worksheet-1

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

(c) total internal reflection takes place in them

(d) all the light is refracted through them

4. The image formed by a plane mirror is:

(a) at the same distance behind the mirror as the object is in front of it

(b) laterally inverted

(c) of the same size as that of the object

(d) all of these

5. The phenomenon of light passing through the object is called:

(a) Reflection                       (b) Refraction

(c) Dispersion                      (d) total internal reflection

6. The phenomenon of light coming back after hitting a smooth plane surface is called:

(a) Reflection                       (b) Refraction

(c) Dispersion                      (d) total internal reflection

7. The image formed by a plane mirror is:

(a) virtual and smaller

(b) real and laterally inverted

(c) real and the same size as that of the object

(d) virtual and same size

8. Plane mirrors are arranged parallel to each other to get:

(a) a single image

(b) two images

(c) a large number of reflected images

(d) no image

9. If the angle of incidence is 80°, what will be the angle of reflection with respect to the normal drawn perpendicular at the point of reflection?

(a) 80°               (b) 100°             (c) 160°              (d) 20°

10. The E.N.T. doctor uses a:

(a) convex mirror                         (b) convex lens

(c) plane mirror                            (d) concave mirror

Answer Key:

(1)-(a); (2)-(a); (3)-(b); (4)-(d); (5)-(b); (6)-(a); (7)-(d); (8)-(c); (9)-(a); (10)-(d)