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प्रश्न
Infrared radiations are used in warfare. Explain with reason, why?
उत्तर
Because they are not readily visible and do not absorb in fog or haze, infrared radiations are used as signals in warfare.
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संबंधित प्रश्न
Give one use of infrared radiations.
What are infrared radiations?
Give two such properties of infrared radiations which are not true for visible light.
Give reason for the following:
Infrared radiations are used for photography in fog.
Give reason for the following:
Infrared radiations are used as signals during war.
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.
How can the presence of infrared Radiations be detected?
Name the radiations that are used for photography at night.
Assertion (A): Infrared radiations travel long distance through a dense fog and mist.
Reason (R): Infrared radiations undergo minimal scattering in earth's atmosphere.
