Question

Chlorophyll absorbs radiations of wavelength 600 nm. What are the frequency and wavenumber of this radiation ??

Answer 1

frequency = velocity of light / wave length

wave length = 600 nm = 600×10 power -9 m

velocity of light = 3 × 10 power 8 m/s

therefore,

frequency = 3×10 power 8 / 600×10 power -9

                = 3×10 power 8 ×10 power 9 / 600

                = 3× 10 power 17 / 6 × 10²

                = 3× 10 power 15 / 6

                = 10× 10 power 14 / 2

                = 5× 10 power 14  Hz

therefore frequency = 5× 10 power 14  Hz

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