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Electromagnetic radiation and spectra

Yellow light emitted from a sodium lamp has a wavelength (λ) of 580 nm. Calculate the wave number (V¯) of the yellow light

The answer is : 1.7241×10y m1. The value of y is


 Wavelength of yellow light =580nm=580×109m   Wave number, (v¯)=1λ=1580×109m =1.7241×106m1

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