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A molecule emits light a photon with an energy of 8x10-19 J. What is the wavelength in metres of this photon?
Speed of light is 3.00 x 108 m s-1. Planks constant is 6.626 x 10-34 J s.
Give your answer to 3 significant figures. Do not enter units!For large or small numbers, use scientific notation, for example 1.23E-4
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