Calculate wavenumber of wavelength is 42 nm
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Wavenumber = 1/Wavelength
= 1/(42 nm)
= 1/(42 * 10^-9 m)
= 10^9 / (42 m)
= 2.38 * 10^7 m^-1
= 1/(42 nm)
= 1/(42 * 10^-9 m)
= 10^9 / (42 m)
= 2.38 * 10^7 m^-1
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