Physics
Amount of water vapour (gaseous) in a given volume of air (cubic metre) is known as:

Relative humidity
Specific humidity
Absolute humidity
Mixing ratio

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Physics
Rainbows are produced when sunlight :

Incident on raindrops hanging in the atmosphere is dispresed after suffering reflection.
Incident on rain drops hanging in the atmosphere is dispersed after suffering refraction and internal reflection.
Incident on rain drops hanging in the atmosphere is dispersed after suffering refraction
None of the given statements is correct.

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