Question
Humidity and Dew point
| Humidity | Dew point | ||
| (i) | The dampness or moistness of air due to the presence of water vapour in it is called humidity | (i) | The temperature at which air becomes saturated with water vapour is called dew point. |
| (ii) | It is usually measured in terms of relative humidity which is a percentage. | (ii) | It is measured in terms of temperature in degree celcius. |
| (iii) | When air is saturated with water vapour, the relative humidity is 100%. | (iii) | When the temperature falls below the dew point, when relative humidity is 100%, a dew starts forming. |
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