what are atmospheric windows and which effect do they have on the earth‘s energy?


what are atmospheric windows and which effect do they have on the earth‘s energy?

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Some materials allow light to pass through them. Think about sitting at a window with the sunlight shining through onto your arm, the light is passing through the glass. But materials are not usually transparent to *all* light in the same way; you generally won’t get a sunburn through a window for example. This is because while the window is transparent to visible light it is more opaque to ultraviolet light that would cause sunburn. Varying transparency to different frequencies of light extends to other materials, even the air itself.

Anything with a temperature will radiate some of its heat away in a form of light. This is what thermal cameras are looking at, the infrared light emitted by objects. The frequency of that emitted light depends directly on the temperature of the object with a higher temperature creating higher frequency light. If you get something hot enough the frequency of light will begin to enter the visible range and it will glow.

When you are sitting at the window you are receiving visible light onto your skin which is absorbed and converted to heat. That heat then begins to radiate away from you but at different frequency, a lower frequency of light than you can see. But the window which is transparent to visible light is mostly opaque to that lower infrared light so it traps the energy within the room. The same window glass which allowed the light energy in is now trapping it from escaping. A greenhouse uses this basic concept to trap heat and make its interior warmer.

An “atmospheric window” is a range of frequencies of the atmosphere with little to no absorption of electromagnetic waves. They are useful for us to look through, such as for astronomy or communication. They can also affect Earth’s temperature because light might enter through an atmospheric window’s range of frequencies and then be trapped like in the greenhouse, unable to easily leave because it is now a different frequency without such a window.

Atmospheric windows are areas of the electromagnetic spectrum that the atmosphere is transparent to and allow energy to pass through. These areas are in the infrared and microwave regions of the spectrum. The effect that these atmospheric windows have on the earth’s energy is that they allow energy from the sun to reach the earth’s surface and warm it. This energy is then radiated back out into the atmosphere in the form of infrared radiation, which is absorbed by the atmosphere and re-emitted in all directions. This process helps to keep the earth’s surface at a comfortable temperature.

Atmospheric windows are areas of the electromagnetic spectrum in which the atmosphere is transparent. These windows allow certain wavelengths of radiation, such as visible light and infrared radiation, to pass through the atmosphere and reach the Earth’s surface. This radiation is then absorbed by the Earth’s surface and atmosphere, which heats the Earth and drives the global climate.