Q2.What is different types of objects?
Ans. Different types of objects are:
- Luminous objects: Objects which emits light of their own are called Luminous objects.
Example: Stars, electric bulb, burning candle.
- Non luminous objects: Objects which do not emit light of their own are called non luminous objects.
- Point size objects: Objects of small size are known as point size objects. Point sized objects are noted by a dot.
- Extended objects: Large objects are known as extended objects. Extended objects are represented by drawing an arrow pointing upwards.