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What Is Relative Humidity?
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Fog on Oak Island, Nova Scotia, Canada Sling psychrometer Illustration of two psychrometers: on the left, a sling psychrometer with two thermometers and a handle for swinging; on the right, a stationary psychrometer with labeled dry-bulb and wet-bulb thermometers, wicks, and a water container. A table showing relative humidity values dry-bulb temperature values on the y-axis and the difference between the dry-bulb and wet-bulb temperatures on the x-axis.
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Fog on Oak Island, Nova Scotia, Canada
As air cools near Earth's surface, fog results when relative humidity rises to 100...
© Adwo/Shutterstock.com
Sling psychrometer
The air flow that produces the wet-bulb temperature is achieved by rapidly rotating...
National Weather Service, Riverton, Wyoming
Psychrometer
Psychrometers are tools used to measure the temperature of ambient air and the temperature...
Encyclopædia Britannica, Inc./Steven N. Kapusta
Calculating relative humidity using a values taken from readings made by dry-bulb and wet-bulb temperatures.
A location's relative humidity may be obtained by using a matrix of values that relate...
Encyclopædia Britannica, Inc.