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Homework Help: Calculate the frequency of red light of wavelength

  1. May 11, 2008 #1
    1. The problem statement, all variables and given/known data
    The speed of light is [tex]3 \times 10^8 ms^{-1}[/tex]. Calculate the frequency of red light of wavelength [tex]6.5 \times 10^{-7} m[/tex].

    2. Relevant equations
    [tex]v = f\lambda[/tex]
    [tex]f = \frac{v}{\lambda}[/tex]

    3. The attempt at a solution

    [tex]v = 3 \times 10^8 \ ms^{-1}[/tex]
    [tex]\lambda = 6.5 \times 10^{-7} \ m[/tex]

    [tex]f = \frac{3 \times 10^8 }{6.5 \times 10^{-7} }[/tex]

    [tex]f = 4.6 \times 10^{14} Hz[/tex]
    [tex]f = 450 THz[/tex]

    Is my answer correct?
  2. jcsd
  3. May 11, 2008 #2
    Everything looked fine until [itex]4.6 \times 10^{14}[/itex] became [itex]450 \times 10^{12}[/itex].


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