GEOG 2050 Chapter : 8 24 12
Document Summary
Key concepts: energy, kinetic energy, potential energy, radiant energy, electromagnetic spectrum, wien-planck"s law (pg. 46: global net radiation, short wave, long wave, visible, gamma ray, x-ray, ultraviolet, microwave radio wave. Infrared: earth"s energy budget, input=output equilibrium (more energy in than out = heat) 273 c: travels in electromagnetic waves that vary in wavelength and frequency, travels at the speed of light in a vacuum. Geography 2050 on moodle and figure 2. 5 in text: electromagnetic radiation spectrum. Frequency waves per second- measured in hertz (1 hz = 1 oscillation) see frequency chart: longer wavelengths - up to tens of miles (decreasing frequency, visible light, shorter wavelengths fractions of mm (increasing frequency) Shortwave energy: gamma rays small waves with the most energy of the spectrum, x-rays dense objects absorb x-rays, ultra-violet rays sun emits large amounts of uv, atmosphere absorbs most uv, harmful to life (sunburn)
