Question

explain relative humidity?

Answer 1

Relative humidity is the ratio of the partial pressure of water vapour to the equilibrium vapour pressure of water at a given temperature. Relative humidity depends on temperature and pressure of the system of interest..

Answer 2

Relative humidity is the ratio of the amount of water vapour present in a given volume of air at a particular temperature to the maximum amount of water vapour that the same volume of air can hold at that temperature. It is expressed as a percentage. Thus, relative humidity may be expressed as follows :-

RH = amount of water vapour in a given volume of air at a given temperature/maximum amount of water vapour a the same volume of air can hold at the same temperature × 100

Relative humidity can be measured with the help of hygrometer. A commonly used form of the instrument consists of two thermometers . One is an ordinary thermometer, known as a dry bulb thermometer. The other known 1 as a wet bulb thermometer , has a piece of wet cloth wrap around its bulb.