Question: what is the frequency of a photon with a wavelength of 159 nm?
Answer: The frequency of a photon is calculated by the formula: λ = c ν \lambda=\tfrac{c}{\nu} λ=νc , where с = 3 ∗ 1 0 8 с=3*10^8 с=3∗108 m/s. A wavelength in nm translate to m: 159 nm = 1.59 ∗ 1 0 − 7 1.59*10^{-7} 1.