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High frequency approximation
also called "high energy approximation"

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  1. for scattering or other wave propagation problems, in physics or engineering, is an approximation whose accuracy increases with the size of features on the scatterer or medium relative to the wavelength of the scattered particles

    Source: Wikipedia Unhappy with this fact? more info
    created by user picturefactobot on March 12, 2009
  2. Classical mechanics and geometric optics are the most common and extreme high frequency approximation, where the wave or field properties of, respectively, quantum mechanics and electromagnetism are neglected entirely

    Source: Wikipedia Unhappy with this fact? more info
    created by user picturefactobot on March 12, 2009
  3. Less extreme approximations include, the WKB approximation, physical optics, the geometric theory of diffraction, the uniform theory of diffraction, and the physical theory of diffraction

    Source: Wikipedia Unhappy with this fact? more info
    created by user picturefactobot on March 12, 2009
  4. When these are used to approximate quantum mechanics are called semiclassical

    Source: Wikipedia Unhappy with this fact? more info
    created by user picturefactobot on March 12, 2009
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