Assuming h = 6.63 x 10\({}^{-34}\) joule seconds, what is the approximate energy of a photon in joules in a 1000 nanometer light beam?

W) 2 x 10\({}^{-19}\) X) 2 x 10\({}^{-18}\) Y) 2 x 10\({}^{-17}\) Z) 4 x 10\({}^{-18}\)
W) 2 x 10\({}^{-19}\)