CHM310H1 Lecture Notes - Lecture 3: Solar Constant, Boltzmann Constant, Buffer Gas

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10 Apr 2013
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There"s been water on the surface of the earth for most part of the history. The earth is warm enough to keep the water from freezing. How much the planet is going to change from greenhouse effect: what keeps the planet warm, sun, even though it doesn"t necessarily have to be the sun. If you look at the sun it is white, but if you look away from the sun it is blue: the efficiency of scattering is inversely proportional to the wavelength. Blue low wavelength, high energy | red high wavelength, low energy. Peak : temperature in k, wavelength in microns, for the sun, peak of the maximum emission, temperature of the surface of the sun. If the planet is 0k it doesn"t radiate back. If you are looking from behind you would see a shadow of the earth from the plane, and the area of the shadow of the earth would be pir(square)

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