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2015-05-30T22:08:51+05:30

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Time period T = 2.0 * 10⁻¹⁰ seconds  = 0.2 nano seconds
wave length = λ = c / f

frequency =  f = 1/T = 5 * 10⁹ Hz  = 5 GHz

   wave length = 2.98 * 10⁸ m/sec  / 5 * 10⁹ Hz
               λ  = 0.0596 meters

  we know that:         k λ = ω T = 2 π f T  = 2 π

   k = ω / c  or,
   wave number = k = 2 π / λ =  105.44 radians per meter


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