Why Does My Mirror Fog Up When I Take a Shower?

[Peter G.]

When we take a hot shower, the mirrors go all misty/foggy:

This is due to condensation, but how does this happen?

Is it the hot water from the shower heating up the air together with the water from the shower evaporating into the air forming a hot and humid environment. When this hot and humid air touches the colder glass it can't hold as much water and therefore, condenses, depositing water on the mirror?

Thanks

 

[NobodySpecial]

When this hot and humid air touches the colder glass it can't hold as much water and therefore, condenses, depositing water on the mirror?

Precisely.
There is a temperature - called the dew point - at which water will condense out of the air - which depends on the humidity

 

[Peter G.]

Ok, cool! Thanks NobodySpecial!