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    fedegg00's Avatar
    fedegg00 Posts: 1, Reputation: 1
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    May 13, 2015, 04:12 PM
    red light has a frequencyof 4*10^14. What is the period?
    red light has a frequencyof 4*10^14. What is the period?
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    #2

    May 14, 2015, 05:17 AM
    I'm sure your text book has this basic formula, which you should memorize:



    where is frequency of the wave and is the time period of the wave. It esssentially means that frequency and period are inversely related. If is given in units of cycles per second then T is in units of seconds per cycle. Apply it and see what you get for .
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