Group Light Quiz 1

Refraction

    1. When a ray of light bends at the interface between two (2) mediums is called ______________.
    2. Mirrors reflect, and _______________ refracts light.
    3. The two properties of the above answer that dictates (determined) how light is refracted are its _______________, and its _______________

Figure 1

 

Medium 1

 

 

Medium 2

 

Optically less dense

 

 

Optically more dense

 

  1. The index of refraction (n) = _C_ = speed of light in vacuum
  2. Cn speed of light in medium

    where c = 3.00 X 108 m/s

    You solve for the speed of light in a medium (Cn), by doing the following:

    First multiple both sides by Cn, so that

    (Cn) n = _C_Cn

    Cn

    Then

    Cn n = C

    Next, multiple both sides by 1/n, so that

    Cn (1/n)n = _C_

    n

    Then,

    Cn = _C_

    n

  3. In Table 1, fill in the blank column.
  4. Substance

    N

    Cn

    Crown glass

    1.52

    X 10

    Flint glass

    1.66

    X 10

    Diamond

    2.42

    X 10

    Ice

    1.31

    X 10

    Water

    1.33

    X 10

    Air at 0OC

    1.00029

    X 10

    H2 at 0OC

    1.00013

    X 10

  5. Dispersion of color is the dependence of the speed of light on color. So the color red will move faster than the color green or violet in window glass (Table 2).
  6. Table 2

    Light

    n

    Red

    1.51

    Green

    1.52

    Blue

    1.53

  7. Will yellow move faster than red? Explain.
  8. From the above information, which substance will produce a rainbow with the most colors when light leaves air and enters the lens? Explain.