Question

Let us Revise
1. Classify the following objects as luminous or non-luminous.
Sun, table, lighted candle, wall
, chair, electric bulb, tree, firefly,
star
, book, blackboard, burning coal, moon, pencil, earth,
lantern fish, CFL.
2. Give one example each of the hot and cold natural sources of
light.
3. How can you differentiate between various objects on the basis
of amount of light passing through them?
Rays and Reams​

Answer 1

Explanation:

1.lominus-sun, lighted candle , electric bulb ,star,burning coal, moon

non-lominus- they are left are called non-lominus

2. fire and ice

3.reams