GEO 211 1st Edition Lecture 6 Outline of Last Lecture I Chapter 2 Energy Warming the Earth and the Atmosphere continued A Radiation B Main sources of energy a Sun b Earth s crust C Solar radiant energy is important for life D Internal heat energy is important for geologic changes E electromagnetic energy from the sun F Wave is characterized by wavelength and frequency a Wavelength diagram b Frequency c Wavelength Table of different types of wavelengths Electromagnetic spectrum diagram G Percentages of what the sun emits Outline of Current Lecture II Radiation and Temperature A Radiation laws B Radiation of Sun and Earth C Incoming solar radiation D Atmosphere interferes with it by 1 Absorption 2 Scattering 3 Reflection Current Lecture II Chapter 3 Radiation and Temperature A Radiation laws 1 All objects with temperature above absolute zero emit radiation Both Sun and Earth emit radiation These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute 2 Warmer objects emit more radiation energy Amount of radiation emitted depends on the temperature of emitting object Stefan Boltzmann law E T4 3 The hotter the object the shorter the wavelength of maximum emission of radiation Wavelength of radiation emitted depends on the temperature of the emitting object 4 Good absorbers of radiation are good emitters of radiation B Radiation of Sun and Earth Hot sun 6000K radiates more shortwave radiation Radiates nearly 88 of its energy at wavelengths less than 1 5 m With peak intensity in the visible region near 0 5 m Cooler Earth 288K radiates long wave radiation Radiates most energy nearly between 5 25 m With peak intensity in the infrared region near 10 m C Incoming solar radiation Emitted solar energy travels through space without being interfered D Atmosphere interferes with it by 1 Absorption 2 Scattering 3 Reflection
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