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the debrogli wavelength of an electron is 0.5nm.what is the potential required to stop it?

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the debrogli wavelength of an electron is 0.5nm.what is the potential required to stop it?
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2 Answers

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Retarding potential required to stop electron is

+1 vote
by (2.4k points)
You can use  , one more formulae

  ev= hc/ wavelength

 And Calculate  v
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