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That is the reaction of the cold lens meeting with the heat from the inside.

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Q: Why do eyeglasses fog up when you come inside from the cold?
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Related questions

What causes eyeglasses to fog?

Condensation of water vapour.


Why does a car window fog up on a cold morning?

The air on the inside of the car is warmer than the air outside.


Is fog hot or cold?

cold


Why do brand new car windows fog up inside in cold weather?

Windows fog because the glass is cold and the humidity is high inside the car. It has nothing to do with the age of the car. Try turning the fan up to circulate the air better, and if that doesn't work, turn the AC on -- but turn the heat up so it doesn't get cold. That will do it for sure.


Could fog form on hot nights?

Yes, if there are hot lights out were its cold, chances are they will get fog on them. Yes, if there are hot lights out were its cold, chances are they will get fog on them.


Why would a pair of eyeglasses fog up when brought from a cold place to a warm place?

condensation, when an object goes from a cool place to a warm place, or vice versa, the change in air temperature forms a dew like liquid; condensation


Why do eyeglasses get foggy when you come in from the cold?

The lenses of glasses fog up when we come in from the cold because of a phenomenon called condensation. The lenses are cold, and when we enter a warm room, moisture in the air comes into contact with the cold lenses and collects there. The moisture in the air in the room has some amount of thermal energy that keeps it in the form of a gas or a vapor. But the cold lenses "steal" that thermal energy from moisture coming into contact with them, and the water molecules collect there. Those water molecules no longer have the thermal kinetic energy to remain in the air and condenseon the lens. There's a bit of extra detail in there, but nothing you can't handle.


Do fog lights come on automatic when the headlights come on a 2000 Chrysler sebring convertible?

No, the fog lights have a switch.No, the fog lights have a switch.


What is thicker fog or mist?

mist and fog are kinder the same thing they are formed when the are is ti cold


How a fog froms?

warm air and cold air gets together and make fog


What do you call moisture in cold mornings?

fog


Does fog form in cold weather?

yes it can