Question

4. A plane mirror always forms:
(a) real and inverted image
(b) virtual and erect image
(c) real and erect image
(d) virtual and inverted image
5. Real images:
(a) can be obtained in the screen
(b) cannot be obtained on the screen
(c) are always erect
(d) cannot be seen
II. Give one word for the following:
1. A body which has and emits light of its own
2. A substance which does not allow light to pass through it
3. A substance which allow light to pass through it
4. This is formed when light is blocked by opaque object
5. When moon comes between sun and earth
III. Give two examples of:
Translucent
Opaque
Transparent

​

Answer 1

Answers:

4. (b) virtual and erect image

5. (a) can be obtained on the screen

1. Luminous body

2. Opaque substance

3. Transparent substance

4. Shadow

5. Solar eclipse

Translucent : frosted glass, some plastics, oil paper.

Opaque. : wood, stone, metals.

Transparent : glass, water, air.