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(6.63E-34 J×s)(7.09E14 s) - 2.17E-19 J =

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- Thread starter ApoIlo
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- #1

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(6.63E-34 J×s)(7.09E14 s) - 2.17E-19 J =

- #2

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The unit of a frequency is s^{-1}, not s.

- #3

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The unit of a frequency is s^{-1}, not s.

That must be a mistake on my teacher's part, then. Can you explain further? I'm very new to physics.

- #4

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You can only add and subtract quantities with the same units, namely joules. Here, you subtract the work function of a metal. Your result, the kinetic energy of the photoelectron, is also in joules.

- #5

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- #7

BruceW

Homework Helper

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- #8

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P.s. the equation at hand is the relation between a photons energy and its frequency

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