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Math Help - electromagnetic waves

  1. #1
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    electromagnetic waves

    An electromagnetic wave has a wavelength of 4.62E-7 m and a speed of 2.54E+8 m/s in a particular material. What is the frequency (in Hz) of this wave in the material?
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    Find the wavelength (in m) of this wave in vacuum.
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  2. #2
    Super Member Aryth's Avatar
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    First, we need a formula, it turns out that the relationship is this:

    f = \frac{v}{\lambda}

    Where v is the velocity of the wave and \lambda is the wavelength.

    So we just plug and chug:

    f = \frac{2.54 x 10^8}{4.62 x 10^{-7}}

    If you work it all out, you should get:

    f = 5.50 \ x \ 10^{14} Hz
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