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A molecule emits light a photon with an energy of 8x10 -19 J.  What is the wave...

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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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