The difference in the readings on the wet and dry-bulb thermometers is used to determine

The difference in the readings on the wet and dry-bulb thermometers is used to determine relative humidity. Relative humidity is a measure of the amount of moisture in the air compared to the maximum amount of moisture that the air could hold at a given temperature. It is expressed as a percentage, with 100% relative humidity being the point at which the air is fully saturated and cannot hold any more moisture. The wet and dry-bulb thermometers are used in a device called a hygrometer to measure relative humidity. The dry-bulb thermometer measures the actual air temperature, while the wet-bulb thermometer has a wick that is moistened with distilled water. As air passes over the wet bulb, the water evaporates, causing the temperature to drop. The amount of cooling that occurs depends on the relative humidity of the air, with more humidity resulting in less cooling. By comparing the readings on the dry-bulb and wet-bulb thermometers, it is possible to calculate the relative humidity of the air using a psychrometric chart or formula. This information is useful for predicting weather patterns, determining appropriate clothing for outdoor activities, and assessing the potential for moisture-related problems like mold growth or corrosion.