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dew point
This term is a technical measurement used primarily in meteorology and thermodynamics. It describes a specific threshold of temperature rather than a general state of weather, making it a precise scientific marker for humidity levels.
In practical application, when the actual air temperature drops to the dew point, the air becomes saturated and water vapor condenses into liquid droplets. This process is what creates dew on grass or fog in the air. It is distinct from relative humidity, as the dew point provides an absolute measure of moisture regardless of the current temperature.
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Ví dụ
The dew point is quite high today, so it feels very humid outside.
When the air temperature drops to the dew point, fog begins to form.
We need to calculate the dew point for this experiment in physics class.
A high dew point usually makes the air feel sticky and oppressive.
Check the dew point on the weather app to see if it will be a muggy morning.
The dew point remained constant despite the change in air temperature.
I wonder if the dew point is low enough for frost to form tonight.
The meteorologist explained how the dew point affects cloud formation.