ajdelange
Well-known member
- First Name
- A. J.
- Joined
- Dec 8, 2019
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- 3,213
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- Location
- Virginia/Quebec
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- Tesla X LR+, Lexus SUV, Toyota SR5, Toyota Landcruiser
- Occupation
- EE (Retired)
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Cornell. But this physics I learned by getting into and out of various vehicles with sun roofs in warm/hot weather.
I almost said "Lookup greenhouse effect on the Web" but if you do that you will get pages and pages on global warming. Before people worried about such things (or there was a web) it meant this to a physicist:
"The greenhouse effect refers to circumstances where the short wavelengths of visible light from the sun pass through a transparent medium and are absorbed, but the longer wavelengths of the infrared re-radiation from the heated objects are unable to pass through that medium. The trapping of the long wavelength radiation leads to more heating and a higher resultant temperature. Besides the heating of an automobile by sunlight through the windshield and the namesake example of heating the greenhouse by sunlight passing through sealed, transparent windows, the greenhouse effect has been widely used to describe the trapping of excess heat by the rising concentration of carbon dioxide in the atmosphere." (http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/grnhse.html)
I gather from your tone that you are questioning what I have said. Look up the emissivity of glass. Stand in front of a window and take a picture with an IR camera.
I almost said "Lookup greenhouse effect on the Web" but if you do that you will get pages and pages on global warming. Before people worried about such things (or there was a web) it meant this to a physicist:
"The greenhouse effect refers to circumstances where the short wavelengths of visible light from the sun pass through a transparent medium and are absorbed, but the longer wavelengths of the infrared re-radiation from the heated objects are unable to pass through that medium. The trapping of the long wavelength radiation leads to more heating and a higher resultant temperature. Besides the heating of an automobile by sunlight through the windshield and the namesake example of heating the greenhouse by sunlight passing through sealed, transparent windows, the greenhouse effect has been widely used to describe the trapping of excess heat by the rising concentration of carbon dioxide in the atmosphere." (http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/grnhse.html)
I gather from your tone that you are questioning what I have said. Look up the emissivity of glass. Stand in front of a window and take a picture with an IR camera.
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