How will you find the humidity in air? What will be your conclusion if both the dry and the wet bulb thermometers show the same reading?

We can find the humidity in air by using Hygrometer or dry and wet bulb thermometer. It has two identical thermometers fixed on to a wooden frame. The bulb of one thermometer is kept uncovered. This is the dry bulb thermometer. The bulb of other thermometer is wrapped in a piece of wet cotton cloth. This is the wet bulb thermometer.
When the wind blows, water from the wet bulb thermometer evaporates and thus lowers the temperature. Hence, the wet bulb thermometer records a temperature lower than the dry bulb thermometer. The difference in the readings of the dry bulb thermometer and wet bulb thermometer helps us to find the humidity in the air. The lesser the difference, the more humid is the air.

If both the dry and the wet bulb thermometers show the same reading, it can be concluded that the air is fully saturated and the relative humidity is 100 percent.