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Biology and Chemistry Homework Help
Far IR light intensity as a function of altitude
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[QUOTE="oobgular, post: 5741555, member: 607249"] [h2]Homework Statement [/h2] Hello, so I'm in a class that is building sensors and sending them up in a weather balloon. For my project, I am wanting to quantify the greenhouse effect by measuring the intensity of infrared light emitted as thermal radiation from the Earth as a function of height-- the idea is that as the balloon rises, some of the IR light is absorbed by water vapor and other greenhouse gases, causing intensity to go down. [h2]Homework Equations[/h2] From Wein's displacement law, I know emitted radiation will be about 10 μm. I calculated the change in intensity due to spherical geometry causing an increase in area. [h2]The Attempt at a Solution[/h2] I have a couple questions about the experiment and one problem. 1. It seems like the intensity of far-IR light from the sun is negligible compared to that radiated from the Earth. Is this a reasonable assumption? 2. I am unable to find data on emission of water vapor. Will the light absorbed be re-emitted at the same wavelength, skewing our data? This is my biggest concern, because it would basically invalidate the experiment. Finally, we have been searching for a circuit component that detects light intensity in the 10 μm range. Have any of you used one in this range? It must detect [I]intensity [/I]of the wavelength. Thanks you so much! [/QUOTE]
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Far IR light intensity as a function of altitude
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