- University of Wisconsin - Madison
- Atmospheric And Oceanic Sciences
- Atmospheric And Oceanic Sciences 100
- pgs. 18-22
Last Modified: 2011-07-02
Related Textbooks:(WCS) Introduction to Weather and Climate
this speed is known as the speed of light. nothing can travel faster.
wavelength is the greek word lambda
measured in micrometers, 10^-6m
what if the wavelength is large?
if it is large, not many waves will fit into 300,000 km.
greek letter nu.
speed of light = wavelength times frequency
so low frequency radiation carries low energy
so high frequency radiation carries high energy.
so a small increase in temp leads to a huge increase in emitted radiation
E = constant of proportionality*temperature (kelvin)
per square meter of surface area
the wavelength of maximum emission of an object is related to the object's temperature as the formula above.
the sun emits 44% of its radiation at these wavelengths
earth emits most of its energy at this wavelength
size, color, texture...
earth adn the sun are both examples
radiative eq of the earth is 255 K.
it absorbs some wavelengths of electro magnetic radiation, and is transparent to others
the atmosphere is an example
thus the atmosphere is only transparent to some infra red radiation
since snow is known to be a black body, and is good at aborbing sunlight rapidly, it is equally known as emitting waves just as fast. The rapid emittion of radiation is going to cool station A down faster than Station B.
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