Light, Shadows and Reflections Worksheet-1

Light, Shadows and Reflections Worksheet-1

1. The shape of the shadow depends upon the

(a) Size of the object

(b) Position of source of light

(c) Size of source of light

(d) Shape of the object

2. Image formed by the pinhole camera is

(a) Erect

(b) Inverted

(c) Sometimes erect, sometimes inverted

(d) All of these

3. The fog is

(a) Transparent                             (b) Translucent

(c) Opaque                                     (d) None of these

4. Select the correct statements

(a) Black thick paper is translucent

(b) The partial shadow is called umbra

(c) The shadow of a coloured object is also coloured

(d) Light travels in a straight line

5. When Abhishek looked at a lighted torch an object he could see a faint glow, but not the torch. The object is

(a) Transparent                             (b) Opaque

(c) Translucent                              (d) None of these

6. What happens when light falls on a wooden chair?

(a) Light is reflected from the chair to our eyes

(b) Light passes through the wooden chair

(c) The chair sends a signal to our eyes that enables us to see it

(d) Energy is given out by the chair

7. Shadow moves on screen when

(i) The source moves parallel to the screen.

(ii) The object moves parallel to the screen

(iii) The source moves away from the screen

(iv) Colour of the source of light changes

(a) (i) & (ii)                                     (b) (ii) & (iii)

(c) (iii) & (iv)                                  (d) (i), (ii) & (iii)

8. Which one is natural source of light?

(a) Tube light                                 (b) Electric bulb

(c) Sun                                             (d) None of these

9. Which surface will reflect most of the light falling on them?

(a) Flat surface                             (b) Shining surface

(c) Rough surface                         (d) Opaque surface

10. The image formed by a pinhole camera is upside-down because

(a) Light travels in straight line

(b) Light rays become laterally inverted as they pass through a pin hole camera

(c) Light rays pass through the pin hole

(d) Light rays get reflected.

Answer Key:

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