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Light of wavelength 345 nm shines on a piece of calcium

Light of wavelength 345 nm shines on a piece of calcium metal. What is the speed of the ejected electron? (Light energy greater than that of the work function of calcium ends up as kinetic energy of the ejected electron.) Work function for calcium= 4.34 x 10^-19 J.

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Physics: Light of wavelength 345 nm shines on a piece of calcium

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