Light Worksheet-5

Light Worksheet-5

1. The phenomenon due to which left hand side of an object appears as right hand side in a plane mirror is called :

(a) inversion                                  (b) lateral inversion

(c) upside down inversion          (d) None of these

2. Which is not the characteristic of the image formed in a plane mirror?

(a) Image is virtual

(b) Image is erect

(c) Image is of different size than object

(d) Image is formed as far behind the mirror as the object is in front of it.

3. When the extended source of light is smaller than the opaque body the umbra region of shadow is :

(a) smaller than penumbra region

(b) bigger than penumbra region

(c) equal to the size of penumbra region

(d) none of these

4. When the extended source of light is bigger than the opaque body the penumbra region is :

(a) equal to the size of umbra region

(b) smaller than the size of umbra region

(c) bigger than the size of umbra region

(d) None of these

5. Which is not an optically heterogeneous medium?

(a) Air                                             (b) Clouds

(c) Diamond                                  (d) Muddy water

6. A medium which allows most of the light energy to pass through it is called :

(a) opaque                                      (b) transparent

(c) translucent                              (d) None of these

7. Match the column I with column II and select the correct option from the codes given below:

(a) (A)–(1); (B)–(3); (C)–(2)

(b) (A)–(2); (B)–(3); (C)–(1)

(c) (A)–(3); (B)–(2); (C)–(1)

(d) (A)–(1); (B)–(2); (C)–(3)

8. Light energy is _____energy.

(a) visible                                       (b) invisible

(c) visible or invisible                  (d) none of these

9. Which of the following are the properties of a plane mirror image?

(i)     The image is at the same distance as the object

(ii)    The image is upright

(iii)   The image is laterally inverted

(a) (i) only                                      (b) (i) & (ii)

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

Answer Key:

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