calculate the frequency and wave number of blue light of wave length 4800A
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Frequency= Velocity/Wavelength
=(3 x 10^8m/s) / (480 x 10^-9 m)
=6.25 x 10^14 Hz
Wavenumber= 1/Wavelength
=1/(480 x 10^-9m)
=2.086 x 10^6 m^-1
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