Advertisements
Advertisements
Questions
Give reason for the following:
Infrared radiations are used for photography in fog.
Why are infra-red radiation’s preferred over ordinary visible light for taking photographs in the fog?
Solution
Infrared radiations are used in photography in fog because they are not much scattered by the atmosphere, so they can penetrate appreciably through it.
APPEARS IN
RELATED QUESTIONS
Give one use of infrared radiations.
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.
Give reason for the following:
A rock salt prism is used instead of a glass prism to obtain the infrared spectrum.
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.
Name the radiations which are absorbed by the green house gases in the earth's atmosphere.
Name the radiations that are used for photography at night.
Infrared radiations are used in warfare. Explain with reason, why?
State one harmful effect of the infrared radiation.