GEO 211 1st Edition Lecture 6 Outline of Last Lecture I. Chapter 2- Energy: Warming the Earth and the Atmosphere continuedA. RadiationB. Main sources of energya. Sunb. Earth’s crustC. Solar radiant energy is important for lifeD. Internal heat energy is important for geologic changesE. electromagnetic energy from the sunF. Wave is characterized by wavelength and frequencya. Wavelength diagramb. Frequencyc. Wavelength- Table of different types of wavelengths - Electromagnetic spectrum diagramG. Percentages of what the sun emitsOutline of Current Lecture II. Radiation and TemperatureA. Radiation lawsB. Radiation of Sun and EarthC. Incoming solar radiationD. Atmosphere interferes with it by1. Absorption2. Scattering3. ReflectionCurrent LectureII. Chapter 3- Radiation and TemperatureA. Radiation laws1. All objects with temperature above absolute zero emit radiation- Both Sun and Earth emit radiationThese 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=ƠT43. The hotter the object, the shorter the wavelength of maximum emission of radiation- Wavelength of radiation emitted depends on the temperature of the emitting object4. Good absorbers of radiation are good emitters of radiationB. Radiation of Sun and Earth- Hot sun (6000K) radiates more shortwave radiation- Radiates nearly 88% of its energy at wavelengths less than 1.5µm- With peak intensity in the visible region near 0.5µm- Cooler Earth (288K) radiates long wave radiation- Radiates most energy nearly between 5-25µm- With peak intensity in the infrared region near 10µmC. Incoming solar radiation- Emitted solar energy, travels through space without being interferedD. Atmosphere interferes with it by1. Absorption2. Scattering3.
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