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प्रश्न
What do you understand by candle power?
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उत्तर
To measure the brightness of light in comparison with the brightness of a candle. The unit of candle power is used.
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संबंधित प्रश्न
Match the following columns
| Column A | Column B |
| a. Wooden block | i. new moon's day |
| b. Sun | ii. rectilinear propagation of light |
| c. Umbra | iii. opaque body |
| d. Eclipse | iv. luminous body |
| e. Solar eclipse | v. complete dark park |
Write the names of some cold light-emitting objects.
Write true or false
The moon has its own light.
Write true or false
The stars have no light.
Write true or false
Opaque objects do not allow light to pass through them.
_______ is the natural source that stimulates sight and makes things visible.
Mirrors change the direction of light that fall on them.
A ray of light passes from one medium to another medium. Refraction takes place when angle of incidence is ______.
If the energy of incident beam and the scattered beam is the same, then the scattering of light is called as ______ scattering.
Look at the figure given in the following figure.
Will there be any difference in the shadow formed on the screen in A and B.
