Calculate wavelength of electron

AI Thread Summary
The discussion focuses on calculating the wavelength of an electron using the formula λ=h/p, with a specific case where the electron's speed is 0.6c. The initial calculation yielded a wavelength of 4.04E-12 m, but the textbook answer is 3.23 pm. To resolve the discrepancy, it is suggested to use the relativistic formula λ=h/γp, where γ accounts for relativistic effects. Participants discuss the concept of momentum dilation in the context of relativistic physics. Overall, the conversation emphasizes the importance of incorporating relativistic factors in calculations involving high-speed particles.
okgo
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Homework Statement



http://www.screencast.com/users/trinhn812/folders/Jing/media/9582a1aa-b21a-4e50-8774-b60866a7d666

Homework Equations



lambda=h/p

The Attempt at a Solution


So I got 4.04E-12 m but the book says the answer is 3.23pm

I'm not sure where I'm wrong
 
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The speed of the electron is 0.6c, so you need to to use

λ=h/γp where γ = 1/√(1-(v/c)2)
 
Thanks. So in addition to time dilation and length contraction, is this what you call momentum dilation?
 
okgo said:
Thanks. So in addition to time dilation and length contraction, is this what you call momentum dilation?

Not sure if that is what it is called, but I call it momentum accounting for relativistic effects.
 
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