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Which has the longest wavelengthA. infrared lightB. ultraviolet lightC. radio-wavesD. X-rays |
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Answer» Correct Answer - C Comparing the given equation `E_(y)=2.5(N)/(C)cos[(2pixx10^(6)(rad)/(sec))t-(pixx10^(-2)(rad)/(sec))x]` With the standard equation `E_(y)=E_(0)cos(omegat-kx)` we get `omega=2pif=2pixx10^(6)` `:. f=10^(6)Hz` Moreover, we know that `(2pi)/(lamda)=k=pixx10^(-2)m^(-1)implieslamda=200m` |
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