Light Worksheet-2

Light Worksheet-2

1. When a ray of light traveling through some optical medium, on striking some surface, is returned to the same medium, the phenomenon is called :

(a) rectilinear propagation of light

(b) reflection of light

(c) refraction of light

(d) None of these

2. When a parallel beam of light on striking some smooth polished surface is reflected as a parallel beam of light, the phenomenon is known as :

(a) reflection of light

(b) normal reflection of light

(c) regular reflection of light

(d) irregular reflection of light

3. The beam of light coming from the head- light of car is a :

(a) convergent beam

(b) divergent beam

(c) parallel beam

(d) None of these

4. The rays coming out of a cine projector form a :

(a) convergent beam                   (b) divergent beam

(c) parallel beam                          (d) None of these

5. The modern unit of luminosity of light is :

(a) lumen           (b) watt              (c) watt hour     (d) candle power

6. The amount of light received per unit area from a source of light is called:

(a) luminosity of light

(b) force of light

(c) intensity of light

(d) Luminosity or intensity of light

7. The image of the teeth seen by a dentist while testing teeth is

(a) Erect and real                         (b) Erect and virtual

(c) Inverted and virtual               (d) Inverted and real

8. Shadow of an object is produced, when it is placed in the path of light ray, because

(a) Light contains material particles

(b) Light travels very fast

(c) Light rays travel in straight line

(d) Light rays are electromagnetic in nature

9. The mirror which is used for side view in vehicles is

(a) Plane mirror                           (b) Concave mirror

(c) Convex mirror                        (d) None of these

10. White light is composed of

(a) Seven colours                          (b) Five colours

(c) Three colours                          (d) Only one colour

Answer Key:

1. (b)
2. (c)
3. (b)
4. (a)
5. (a)
6. (c)
7. (b)
8. (c)
9. (c)
10. (a)