38.18 The electromagnetic radiation emitted from the Sun is most intense at around 502 nm. (a) What is the energy per photon (in J) for light of this wavelength? (b) What is the energy per photon in electron volts? (c) What is the momentum per pho- ton? (d) How fast would an electron (melectron to be travelling to have the same momentum as this photon? 9.1 x 10-31 kg) need (e) What would the de Broglie wave- length of such an electron be?

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