Question

VW/20-21/14
Q3. Give one word for the following:p
1. Change in the direction of light after striking a polished surface
2. The phenomena of left appearing right and right appearing left in a mirror
3. The lens thinner that in the middle
4. Virtual images are always
5. Type of lens that always forms a virtual image
Q4. Observe the figures carefully. The given figures show the path of light
through lenses of two different types, represented by rectangular boxes A
and B. What is the natu re of A and B?​

Answer 1

1. Change in the direction of light after striking a polished surface - Reflection of light.

2. The phenomena of left appearing right and right appearing left in a mirror - Lateral inversion.

3. The lens thinner that in the middle - Concave lens.

4. Virtual images are always - Inverted.

5. Type of lens that always forms a virtual

image - Concave lens.

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Light - Light is a form of energy which gives us sensation of site.

Reflection of light - The phenomenon of bouncing back of light rays in the same medium on sticking a smooth surface is known as reflection of light.

Convex lens - It is a type of lens which is thicker from the center and thinner at its end. It is also known as converging lens.

Concave lens - It is a type of lens which is thinner from the center and thicker from its end. It is also known as diverging lens.