When does refraction occur

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• When does refraction occur?

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• Why does a spear fisherman aim at a fish's tail?

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• Can you determine wavelength based on the
  equation you have for determining velocity?

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Laser Light Amplification by Stimulated Emission
of Radiation A typical laser emits light in a
narrow, monochromatic beam with a well-defined
wavelength.
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• Total Internal Reflection-
• When light passes from a more optically dense
  medium to less dense at an angle so great that
  there is no refracted ray

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• Critical angle When the incidence angle causes
  the refracted ray to lie right along the boundary
  of a substance the this angle of incidence is
  known as the critical angle.

Sin ?c nr ni
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• Suppose that the angle of incidence of a laser
  beam in water and heading towards air is adjusted
  to 50-degrees. What is the angle of refraction?

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• The critical angle for a special glass in air is
  41 degrees. What is the critical angle if the
  glass is immersed in water?

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• Hot air tends to be less optically dense than
  cooler air
• a nonuniform medium is created by the heating of
  the roadway and the air just above it
• While light will travel in a straight line
  through a uniform medium, it will refract when
  traveling through a nonuniform medium.
• If a driver looks down at the roadway at a very
  low angle (that is, at a position nearly
  one-hundred yards away), light from objects above
  the roadway will follow a curved path to the
  driver's eye

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• Dispersion the separation of light into its
  spectrum
• When will light be dispersed? What conditions
  allow for dispersion?

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• Where do you have to be standing relative to the
  sun to see a rainbow?

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• When a light wave moves from air to water, the
  light bends (towards/away) from the normal.

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• If a light ray has an angle of incidence of 21
  degrees, the angle of reflection is

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• When light ray bounce off a rough surface and
  thus are reflected back scattered

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• Snells law is

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• Water/air/glass is most optically dense

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• Water/air/glass has the highest value for n

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• Can you ever have a value for n less than 1.00?

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• You can find the wavelength change as it move
  from one medium to another with this equation

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Why does the light come out of a prism separated
into the component colors? Why dont they get
separated coming out of a window?