OSU Ph 212 2nd midterm

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Rayen
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46566
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OSU Ph 212 2nd midterm
Updated:
2010-11-01 17:54:08
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OSU Ph
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2nd midterm information
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  1. The index of refraction
    n = c/v

    • n = optical density (n=>1)
    • c = speed of light == 3.00 *108
    • v = the apparent spped of light in a material (v<=c)
  2. Intensity

    Intensity is the power contained within the wave divided by the surface over the wave moves

    power tells you the most information
    I = P / A

    • I = intensity
    • P = power
    • A = area
  3. intensity

    expands in all directions Area is
    Area = 4πr2

    Area of a sphere
  4. Intensity

    Expands in one direction Area is
    Area = 2πr^2

    Area of a hemisphere
  5. Intensity

    Doesn't expandes Area is
    Area = πr2
  6. Inverse Square Law
    is any physical law stating that some physical quantity or strength is inversely proportional to the square of the distance from the source of that physical quantity.
  7. Logx (A*B) =
    = (logxA) + (logxB)

    = 10A*10B == 10A+B
  8. Logx(A/B) =
    = Logx(A) - Logx(B)

    = (10A)/(10B) == 10A-B
  9. Logx(An) =
    = n(logx(A))

    10An == 10A*n
  10. Change in base log
    LOOK UP.

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