Physics

Problem

The energy of a photon is

2.75\,\text{eV}

. Given that

1\,\text{eV} = 1.60 \times 10^{-19}\,\text{J}

, what is the wavelength of the photon in vacuum, expressed in nanometres? a)

364\ \text{nm}

452\ \text{nm}

662\ \text{nm}

723\ \text{nm}