Advertisements
Advertisements
प्रश्न
Give reason for the following:
Infrared radiations are used as signals during war.
उत्तर
Infrared radiations are used as signals during the war as they are not visible and they are not absorbed much in the medium.
APPEARS IN
संबंधित प्रश्न
Give one use of infrared radiations.
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:
The photographic darkrooms are provided with infrared lamps.
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.
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.
