GEOG 1112 Lecture Notes - Lecture 4: Radiant Energy, Radiant Intensity, Emissivity
7 May 2017
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Lecture 4 | radiation earth sun (part 1) Characteristics of radiation: radiation quantity and quality, radiation quantity refers to amount of energy transferred, associated with wave height, or amplitude, radiation quality, relates to radiation wavelength, or the distance between the wave crests. Identifies the type of radiant energy: radiation, everything emits radiation the sun, the earth, ourselves, the building, I = st4: where i is in w m-2, s is a constant (5. 67*10-8 w m-2 k-4), and t is in kelvin, wein"s law. Kelvin: temperature conversions, fahrenheit to celsius, oc = (of-32)/1. 8, celsius to fahrenheit, of = 1. 8 oc + 32, celsius to kelvin, k = oc + 273. Sun: the sun is the major source of energy for the earth, the energy is produced by fusion of hydrogen atoms in the core, the amount of the energy received by the earth is affected by earth-sun relationships The sun is 20x hotter than the earth.
