2006-07-19 21:58:22 · 4 answers · asked by ???????? 2 in Science & Mathematics ➔ Physics
Hi,
Fog on glasses can be created without it raining.
How about when you take a steamy hot shower and the bathroom mirror fogs up. I'm sure you have seen that.
A hot shower represents a humid state with lots of water vapor.
Whenever you have a warm temperature that has lots of water vapor and it comes in contact with something that is colder the water vapor will condense (form little droplets) on the surface of the colder item.
An ice cold glass of water put in a warm room will have droplets on it.
The defroster in your car attempts to raise the temperature of the glass so that the water vapor in the car does not cloud the windows.
Defrosters that also have the capability of using the air-conditioning (which takes the humidity out of the air) are more effective.
Another term for this condition is dew point
2006-07-19 22:06:13 · answer #1 · answered by wizzie b 3 · 0⤊ 0⤋
Water is soluble in air as water vapour - that is, a gas rather than water droplets. When air is warm it can hold more water vapour than when it is cold, just as boiling water can dissolve more sugar than cold water.
When the air cools, as it does when it rains, it becomes overloaded with water (saturated) and some condenses out and forms droplets on any surface which is a little cooler, such as windows, mirrors and glasses.
2006-07-20 05:12:59 · answer #2 · answered by Owlwings 7 · 0⤊ 0⤋
Moisture in the air condensates.
2006-07-20 05:03:15 · answer #3 · answered by ltgauss 1 · 0⤊ 0⤋
through condensation
2006-07-20 05:02:13 · answer #4 · answered by Rani 1 · 0⤊ 0⤋