De Broglie Wavelength of Accelerated Proton

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SUMMARY

The discussion centers on calculating the de Broglie wavelength of a proton accelerated from rest through a potential of 1 kV. The correct formula to use is λ = h/p, where h is the Planck constant and p is the momentum of the proton. The user initially miscalculated the momentum due to unit confusion, using electron volts instead of joules. The correct velocity of the proton after acceleration is approximately 437,621.13 m/s, leading to an accurate calculation of the de Broglie wavelength.

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  • Understanding of de Broglie wavelength and its formula λ = h/p
  • Knowledge of kinetic energy equations, specifically eV = 0.5 * m * v^2
  • Familiarity with unit conversions between electron volts and joules
  • Basic concepts of momentum in physics
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  • Research the implications of de Broglie wavelength in quantum mechanics
  • Learn about the Planck constant and its applications in particle physics
  • Study the relationship between kinetic energy and momentum in accelerated particles
  • Explore unit conversion techniques between different energy units, such as eV and J
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Students studying physics, particularly those focusing on quantum mechanics and particle physics, as well as educators looking to clarify concepts related to wave-particle duality and energy-momentum relationships.

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Homework Statement


A proton is accelerated from rest through a potential of 1kV. Find its de Broglie wavelength.

Homework Equations


\lambda=h/p

The Attempt at a Solution


I tried to get p (momentum) by energy comparison:

e*1000=0.5*m*v^2
v=437 621.130 016 524 m/s

which doesn't makes sense... what am I doing wrong?
 
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Do you mean 437621.130016524 m/s? Or 437,621,130,016,524 m/s? If the first, then that is roughly what I get when using google calculator (but why so many places after the decimal??), why doesn't it make sense to you? If the second, then that indeed doesn't make sense ,and I would recommend trying to put in the numbers again.
 
Oh snap!
It didn't make sense since I used Planck constant with eV*s units all the time instead of J*s units...

Thanks nicksauce.
 

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