What is the energy of a photon of light having a wavelength of 4.5 x 10-7 meters? (Planck’s constant is 6.626 x 10-34 joule seconds; the speed of light is 2.998 x 108 m/s)
2.9817 x 10-40 joules
4.4143 x 10-19 joules
6.6745 x 10-26 joules second
9.9456 x 10-49 joules
19.864 x 10-26 joules/second

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