Answer: if exists as a clear colorless gas
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Why can't you see the water vapor in the air?
Water Vapor - earthobservatory.nasa.gov
Why Do You See Your Breath When It's Cold Outside? » Science ABC
Water Vapor - NASA
It's the water vapor in your breath after it becomes liquid water . Warmer air is able to hold more water vapor than cooler air. When you breathe onto a cold surface the air in your breath is...
Know that dry steam is invisible and so is the water vapor. Only time we see water vapor in the air in when the temperature of the air drops below the “dew point” temperature . Dew or fog forms at or below the dew point temperature. Also know that the air at higher temperature holds more moisture/water vapor than at lower temperature.
Steam is water vapor but that stuff you can see isn't steam . Neither steam nor water vapor are visible. The cloud of white stuff you can see above a boiling kettle is water droplets formed by the condensation of the water vapor/steam as it collides with the cooler air outside the kettle.
Water vapour is a clear and colourless gas so it can't be seen by the naked eye . What you see in the photo in your second link is (partially) condensed water vapour i.e. fog (or mist). Fog contains tiny discrete water droplets and light bounces off their surface in random directions causing the visibility.
Another pattern that shows up in the time series is that water vapor amounts over land areas decrease more in winter months than adjacent ocean areas do. This is largely because air temperatures over land drop more in the winter than temperatures over the ocean . Water vapor condenses more rapidly in colder air.
Wed Mar 22 2017 · Why do I see my exhaled breath on a c...
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