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प्रश्न
Give reason for the following:
The photographic darkrooms are provided with infrared lamps.
उत्तर
Infrared lamps are used in dark rooms for developing photographs since they do not affect the photographic film chemically, but they provide some visibility.
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संबंधित प्रश्न
Mention three properties of infrared radiations similar to the visible light.
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.
A radiation P is focused by a proper device on the bulb of a thermometer. Mercury in the thermometer shows a rapid increase. The radiation P is ______.
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.
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.
