Chapter19b - Atmospheric Optics - II The exam will be...

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Atmospheric Optics - II
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First midterm exam is this Wednesday! The exam will be in-class, during our regular lecture this Wednesday  February 13 at 3 pm The exam will be  CLOSED BOOK   No textbooks No calculators No cheat-sheets Alternate seating The grades will be posted on WebCT The exam covers Chapters 1,2,3,4,5, and 19. The sections which are not covered are listed on the  Class Notes  section  of the class web page.
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Human perception of  color,  white objects, black objects. Light scattering:  light is sent in all directions –forward, sideways and backward Geometric scattering:  R>> λ (all wavelengths equally scattered)  Mie scattering:  R~ λ (red is scattered more efficiently) Rayleigh scattering:  R<< λ (blue is scattered more efficiently) Phenomena: white clouds, blue skies, hazy skies, crepuscular rays, colorful sunsets, blue moon. Refraction : the bending of the light ray as it travels from one medium to another. It bends  towards  the vertical if it enters a more-dense medium and  away  from the vertical as it enters a less-dense  medium.  Phenomena: stars appear higher in the sky, twinkling, twilight. Reflection : the angle of incidence is equal to the angle of reflection Total internal reflection : mirages Dispersion : separation of colors when light travels through a medium. rainbow
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Chapter19b - Atmospheric Optics - II The exam will be...

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