Infrared radiations are preferred over ordinary visible light for taking photographs in fog because

Infrared radiations have smaller wavelength

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Infrared radiations have larger wavelength

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Infrared radiations are scattered to a greater extent

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Infrared radiations reacts with fog and destroys it

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Solution

The correct option is B
Infrared radiations have larger wavelength

Infrared radiations are preferred over ordinary visible light for taking photographs in fog because they have large wavelength and hence are not much scattered by fog and, therefore, they can penetrate appreciably through it.

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Similar questions

Give reason for the following :

(i) Infrared radiations are used for photography in fog.

(ii) Infrared radiations are used for signals during the war.

(iii) The photographic darkrooms are provided with the infrared lamps.

(iv) A rock salt prism is used instead of a glass prism to obtain the infrared spectrum.

(v) A quartz prism is required for obtaining the spectrum of the ultraviolet light.

(vi) Ultraviolet bulbs have a quartz envelope instead of glass.

Mention three properties of infrared radiations similar to the visible light.

Give two properties of infrared radiations which differ front the visible light.

Infrared radiations are used for

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