Physics
Give reason for the following:
Infrared radiations are used for signals during the war.
Related Questions
State one harmful effect each of the (a) ultraviolet and (b) infrared radiations.
Give reason for the following:
Infrared radiations are used for photography in fog.
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.