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प्रश्न
Name a few living things which emit light.
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उत्तर
Jugnu and firefly.
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संबंधित प्रश्न
Explain the difference between a transparent, a translucent, and an opaque medium. Give two examples of each.
Tick the correct answer.
Light is a font of
The sun and ______ are the natural sources of light.
Fill in the blank
Speed of light in vacuum is .................
A ______ is a natural source of light.
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 |
If the energy of incident beam and the scattered beam is the same, then the scattering of light is called as ______ scattering.
Amount of light entering into the eye is controlled by ______.
State Rayleigh’s law of scattering.
Observe the picture given in the following figure 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?
