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Chemistry 79 Online
OpenStudy (anonymous):

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

OpenStudy (anonymous):

Energy (\(E\)) is related to frequency (\(\nu\)) of light by Planck's constant (\(h\)), \(E=h \nu\) The speed of any wave (\(c\)) is just the distance it travels (a wavelength, \(\lambda\)) divided by the time it takes, which is the inverse of the period which is just the frequency (\(\nu\)), \(c = \lambda \nu\)

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