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2.93x10^-19 Joules

first use the v=c/h formula to find frequency

then use the energy formula to find energy.

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Q: The line spectrum of lithium has a red line at 670.8 calculate the energy of a photon with its wavelength?
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What line spectrum of lithium has a red line at 670.8 nanometers calculate the energy of a photon with this wavelength?

178.334kJ/mol.


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The longest wavelength in the visible light spectrum is at the red end (at about 750nm) the lowest is violet (450nm). For a given intensity source the energy that can be generated is equal.The answer you are looking for is 720-680nm


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