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When you take a shower the water droplets have a greater surface area then simply having the water sit in the tub as it does in a bath. The leads to increased evaporation. With more moisture in the air it is easier for condensation to occur on a cool surface such as a mirror.

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12y ago
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Wiki User

11y ago

Cold air holds less moisture than warm air. When you run the shower with hot water, the moisture condenses on the cold mirror surface causing it to fog up.

If you run the shower cold, the mirror will not fog up.

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EMKE GmbH

Lvl 3
4y ago

Part of the water vapor evaporates and atomizes in the air during bathing, when the water vapor encounters the cold mirror, it will condense into fog. You can buy a bathroom mirror with anti-fog function online, this can avoid mirror atomization and affect the use. If you are in Germany, you can try to buy a bathroom mirror on this website.

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14y ago

because when water is hot, it evacuates and turns into gas which fogs

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Q: Why does a hot shower fog up a bathroom mirror?
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Related questions

When you have a cold shower does the bathroom mirror fog up?

No. The steam from a hot shower fogs the mirror.


Why a bathroom mirror fogged while you take a shower?

Cold air holds less moisture than warm air. When you run the shower with hot water, the moisture condenses on the cold mirror surface causing it to fog up. If you run the shower cold, the mirror will not fog up.


Why a hot shower fogs up a bathroom mirror?

the heat from the shower causes it to fog and if ur window for the bathroom is small then it takes a while for the air to escape causing the smoke to become traped to your mirror like if u blow your breath towards the mirror then it fogs and also not only your mirror gets foggy but also the floor or wall.thank u very much


Why does a hot shower fog up a bathroom?

because when water is hot, it evacuates and turns into gas which fogs


Why does the mirror in the bathroom has drops of water after taking a hot shower?

It is called condensation.


Why After a hot shower the bathroom mirror is covered with water?

The 'fog' is condensed steam. During a hot shower, water evaporates to make steam, and when the steam comes into contact with a cold surface, such as a mirror, then it will cool down and condense back to a thin layer of water.


Why do we see drops of water on our bathroom mirrors when we take a hot shower?

The warm, moist air coming from the shower will condense to water droplets on contact with a cool mirror or bathroom window.


Why does the bathroom mirror mists up when you have a shower?

The water vapours spread all over the bathroom when we take bath. They are on the walls, on the mirror and everywhere. However they are easily visible on the mirror as the surface is smooth and water vapours make it difficult to see clearly. Taking showers creates a humid environment. The warm water vapor permeates the air. The mirror, and walls and everything else in the bathroom, are cooler than the air, and the moisture condenses on them. It is the same affect as water condensing on the side of your cold drink on a hot day. same thing when you are in the kitchen


Why do mirrors and windows appear foggy after you take a warm shower during the winter?

it is because when you take a warm or hot shower, then water that you are using condense it to the air & it covers the mirror of your bathroom.


If you have a hot shower what happens to the mirror?

Because the mirror is colder water vapors are condensed on the mirror.


What is fog on the bathroom mirror called?

Fog appears on bathroom mirrors like how your hot breath appears on glass when you breathe on it. The hot vapor in the air mixes with cool glass and fog appears. In other words, water vapor condenses on a smooth, cold surface creating condensation (steam).


How do drops form in a bathroom mirror?

They form after you wash, take a shower or take a bath because the steam that comes up from the hot water rises and sticks or clings to the mirror and they gather more evaporated water as they go.