|MadSci Network: Other|
What cause the steam in the bathroom during a shower? This may not be the question you want to ask. If your project is concerned with the mirror, then the additional question might be "Why does the mirror fog up?" The bathroom steams up for the same reason clouds form and water condenses on the outside of a cold glass. There is water in the air - called humidity. Warm air can hold more water than cold air, so on a warm, humid summer day anything cold taken from the refrigerator will begin to collect water. The bathroom steams up, and it really isn't steam in the sense that it can burn you, because there is more water in the air than it can hold. The humidity is 100% The air can't hold any more moisture so it begins to appear as a cloud - tiny droplets. The mirror, the walls, the floor and anything else in the room that is colder than the air will begin to collect condensation. If you really wish to keep the mirror clear, put a hair dryer on it and warm it until it is warmer than the air. Some cars have electrically heated outside mirrors to keep them clear of ice and condensation. I believe that you can buy bathroom mirrors for the home that too are electrically heated. An old remedy that sometimes works is to rub it with a potato; something used to help keep diving masks clear. But, the simplest method of keeping the mirror clear is prevention. Don't run the water long enough to get significant moisture in the air of the bathroom. Take a Navy shower. Ships at sea have water rationing. You get in the shower, wet down, and immediately turn the water off. Soap yourself, rinse quickly, and get out. There is no rule that I know of that says you must run the water constantly in a shower.
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