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Dart82
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Homework Statement
Find the de Broglie wavelength of a 7.0 eV electron.
Homework Equations
de Broglie wavelength = h/p = h/(mv)
Photoelectric effect equation (not 100% sure)
The Attempt at a Solution
i need to solve for v in de Broglie's equation so i can find the wavelength. i know the mass of the electron is 9.11x10^-31kg, i know that h is Plancks constant, and i know that the work function = 7.0 x (1.602x10^-19 J) BUT how can i find v?
I tried to find v by using the photoelectric effect equation but i didnt get a correct answer:
hf = KE + Work function...BUT how can i solve for v if i don't have the frequency!?
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