UH GEOL 1350 - phenomenons (3 pages)

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phenomenons



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phenomenons

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Lecture number:
22
Pages:
3
Type:
Lecture Note
School:
University of Houston
Course:
Geol 1350 - Introduction to Meteorology
Edition:
1

Unformatted text preview:

Geology 1350 Lecture 22 Outline of Last Lecture I Air Pollution Outline of Current Lecture I Light color and atmospheric optics Current Lecture Reflection scattering refraction diffraction gases aerosol and hydrometer particles Various optical phenomena blues skies rainbows eyes are sensitive to light and color and we see objects because of the light and color that they reflect scattering depends on the size of the objects in particular on the ration diameter of objects vs wavelength types Rayleigh air molecules blue sky red sunsets mie aerosols brownish smog geometric cloud droplets white clouds gas scattering redirection of radiation by a gas molecule without a net transfer of energy of the molecules Rayleigh the longer pathway of light through the atmosphere the more short wavelength are scattered shortly before sundown in unpolluted air blue light and a lot of green light scatters yellow sun special effects in forests blue ridge mtn Virginia blue mtns Australia scattering of blue light by aerosols dust and salts are large enough to cause geometric scattering and change blue skies into hazy white skies aersols and hydrometeor particle scattering redirection of radiation by a particle without a loss of energy to the particle reflection the angle of incidence equals the angle of reflection refraction change of medium if different density speed of wave changes if wave travels into a medium of higher density it refracts toward the surface normal depends on wavelength refraction bends short wavelengths more than long wavelengths example is dispersion of white light into individual colors through a glass or ice crystal prism special case refraction 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 and twilight refraction or needing of sunlight creates an apparent sunrise and late sunset also causes the sun to flatten at its base diffraction wavefront encounters an



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