Calculate the Frequency of Light Whose Wavelength Is 711 Nm

Calculate the frequency of light whose wavelength is 711 nm.

A) 2.80×10 ^{- 19} s ^{- 1}
B) 4.22×10¹⁴ s ^{- 1}
C) 4.22×10⁵ s ^{- 1}
D) 2.10×10⁸ s ^{- 1}
E) none of these