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प्रश्न
Name the radiations that are used for photography at night.
उत्तर
Infrared radiations.
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संबंधित प्रश्न
Give one use of infrared radiations.
What are infrared radiations?
Mention three properties of infrared radiations similar to the visible light.
Give reason for the following:
Infrared radiations are used as signals during war.
Give reason for the following:
The photographic darkrooms are provided with infrared lamps.
Give reason for the following:
A rock salt prism is used instead of a glass prism to obtain the infrared spectrum.
Name the material prism required for obtaining the spectrum of infrared radiation.
Infrared radiations are used in warfare. Explain with reason, why?
Assertion (A): Infrared radiations travel long distance through a dense fog and mist.
Reason (R): Infrared radiations undergo minimal scattering in earth's atmosphere.
State one harmful effect of the infrared radiation.
