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monochromatic light with a frequency of 1.54*10^15 hz is shone onto the surface of tin. the...

monochromatic light with a frequency of 1.54*10^15 hz is shone onto the surface of tin. the total energy of the light shone is 1.02*10^-11j. what is the maximum number of electrons that can be ejected?how much kinetic energy does each ejected electron have?

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Answer #1

Energy of ejected electrons, E = hf

E = (6.626 10-34)(1.54 10-15) = 1.02 10-48 J

The maximum number of electrons released would be the total energy divided by the work function--just enough energy to release them.

1.02 10-11/1.02 10-48 = 1.00 x 1037 electrons.

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