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    aviles's Avatar
    aviles Posts: 1, Reputation: 1
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    #1

    Apr 30, 2009, 07:23 PM
    Physics wavelength
    What is the frequency of an electromagnetic wave if it has a wavelength of 1km (1000m)?
    Perito's Avatar
    Perito Posts: 3,139, Reputation: 150
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    #2

    May 1, 2009, 04:38 AM

    The relationship between the wavelength of light, λ, and the frequency, ν, is



    where c is the speed of light





    Make sure you use the proper units.
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #3

    May 2, 2009, 09:13 AM

    I prefer using the 'traditional' formula , keeping in mind that electromagnetic waves have the speed of light. :rolleyes:
    Capuchin's Avatar
    Capuchin Posts: 5,255, Reputation: 656
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    #4

    May 2, 2009, 09:54 AM

    Jerry, an interesting aside, the speed of light is defined as that, i.e. our definition of meter has been tweaked so that the speed of light is exactly 299792458 m/s
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #5

    May 2, 2009, 10:00 AM

    Oh, I see! Thanks Cap! :)
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #6

    May 2, 2009, 11:56 AM

    Perito agrees: You say "f", I say "nu"... "traditional?" I thought Nu Lambda was traditional!
    Okay, I don't know, but that's how I was taught at school, everything concerning those types of numbers through v=f 'lambda' :p
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