1. Calculate the energy in joules of a photon of electromagnetic radiation whose frequency is 2.76×1014 s−1 .
Express your answer with the appropriate units.

2. Calculate the energy in joules of a photon of radiation whose wavelength is 418 nm
Express your answer with the appropriate units.

3. What wavelength (in meters) of radiation has photons of energy 6.05×10−19 J ?
Express your answer with the appropriate units.