GPHY 102 Lecture 4: The Earth as a Rotating Planet Cont. AND The Global Energy System
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Gphy102 lecture 4: earth as a rotating planet cont. Global time: earth rotates on axis once every 24 hours, time based on relationships between the sun and lines of longitude on earth"s grid, 24 time zones developed to standardize world time. Standardized time map, ontario is set at -5 meaning it is 5 hours behind time "0" which is the prime. Six time zones in canada: newfoundland (half an hour, atlantic, pacific, central, mountain, eastern. Vernal and autumnal equinox: march 21/22 and september 22/23, poles not tilted toward or away from sun, circle of illumination passes through both poles. Electromagnetic radiation: all objects emit electromagnetic radiation, energy that exists as wave, different types have different wavelengths (distance from one crest to another) and frequency (waves her unit time) Shortwave radiation: comes mostly from the sun, high frequency, ultraviolet. 0. 7 micrometers: easily penetrate atmosphere, near-infrared radiation, wavelengths ranging from 0. 7 to 1. 2 micrometers.
