Advertisements
Advertisements
Question
Differentiate between the luminous and non-luminous bodies. Give two examples of each.
Solution
Luminous
The bodies which have the light of their own e.g. sun stars, bulb, candle, oil lamp, torch, a lantern.
Non-Luminous
The bodies-which do not have their own Light. e.g. moon, chair, table. When light falls on them, they become visible.
APPEARS IN
RELATED QUESTIONS
Fill in the blank.
Moon is a .................. body.
What do we call a substance through which we cannot see light? Give an example of such a substance.
Write true or false
The moon has its own light.
Answer the following.
What is meant by luminous intensity? What is one lumen?
Answer the following.
Distinguish between transparent, translucent, and opaque objects.
Write whether of the following objects are luminous or non-luminous.
| Object | Luminous/Non-luminous |
| A book | |
| A burning candle | |
| A wax cloth | |
| A pencil | |
| A pen | |
| A light bulb | |
| A tyre | |
| A torch |
_______ is the natural source that stimulates sight and makes things visible.
Light is a form of ______.
State Rayleigh’s law of scattering.
Observe the picture given in Fig. 11.1 carefully.
A patch of light is obtained at B, when the torch is lighted as shown. Which of the following is kept at position A to get this patch of light?
