Unformatted text preview: -2 μm-1 ) from the earth’s surface over the 2μm to 10μm spectral region. Consider cases of the surface with reflectivity equal to 0.1, 0.5, and 0.9. Assume that the sun is a blackbody with a temperature of 6000K, and that the sun’s power density is reduced by a factor of 66790 from the sun to the earth. The earth is an opaque, gray body with a temperature of 300K. Neglect effects of the atmosphere. For all the three cases, find the wavelength at which the emitted and the reflected power densities are the same....
View Full Document
- Spring '08
- Light, Planet, Fundamental physics concepts, Thermal radiation