College Physics 10th Edition by Raymond Serway,Chris Vuille

Exercise 57

Find the energy of (a) a photon having a frequency of 5.00 × 10 17 Hz and (b) a photon having a wavelength of 3.00 × 10 2 nm. Express your answers in units of electron volts, noting that 1 eV = 1.60 × 10 19 J.