ch 3 - • Amount of energy in an electromagnetic wave that...

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Global Energy Balance: The Greenhouse Effect Electromagnetic radiation: a self-propagating electric and magnetic wave that is similar to a wave that moves on the surface of a pond. Earth is heated by radiation from sun Wavelength: distance between two adjacent crests…wave consists of a series of crests and troughs. Photons and Photon Energy Photon: a single particle or pulse of electromagnetic radiation, smallest discrete amount of energy that can be transported by an electromagnetic wave of a given frequency Electromagnetic Spectrum Full range of forms of electromagnetic radiation, which differ by their wavelengths (or frequencies) Visible radiation aka visible light consists of a narrow range of wavelengths 400- 700mm Flux : the amount of energy or material that passes through a given area per unit time
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Unformatted text preview: • Amount of energy in an electromagnetic wave that passes perpendicularly through a unit surface area/ unit time Inverse square law • Rate at which solar flux decreases with increasing distance Blackbody : something that emits or absorbs electromagnetic radiation with 100% efficiency at all wavelengths Blackbody radiation: radiation emitted by a blackbody, characteristic wavelength distribution that depends on body’s absolute temp. Wien’s law: states that flux of radiation emitted by a blackbody reaches its peak value at a wavelength which depends inversely on body’s absolute temp. Photosphere: surface layer where sun emits most of its energy Stefan-Boltzmann law: states that the energy flux emitted by a blackbody is related to the fourth power of the body’s absolute temp....
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