DeBroglie Equation Post Assessment


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gabbym
Posts: 76
Joined: Wed Apr 11, 2018 3:00 am

DeBroglie Equation Post Assessment

Postby gabbym » Tue Oct 23, 2018 7:32 pm

At what velocity is an electron moving if it has a de Broglie wavelength of 7.0 × 10-11 m? Can someone help me with this problem?

A De Castro 14B 2H
Posts: 75
Joined: Fri Sep 28, 2018 12:29 am

Re: DeBroglie Equation Post Assessment

Postby A De Castro 14B 2H » Tue Oct 23, 2018 7:36 pm

With this problem, use the deBroglie Equation: λ = h/p, where p is momentum = masselectron * velocity. You can rearrange the equation to calculate the velocity: v = h/(λ * masselectron)

Samantha Man 1L
Posts: 63
Joined: Fri Sep 28, 2018 12:22 am

Re: DeBroglie Equation Post Assessment

Postby Samantha Man 1L » Tue Oct 23, 2018 7:37 pm

By plugging in your given wavelength, the mass of an electron (9.11E-31kg), and Planck's constant, you can solve for the velocity.

Jonas Talandis
Posts: 60
Joined: Fri Sep 28, 2018 12:16 am

Re: DeBroglie Equation Post Assessment

Postby Jonas Talandis » Tue Oct 23, 2018 7:38 pm

Hi,

Using the De Broglie equation (Wavelength = h/m*v), we can insert the given wavelength, the Planck constant, and the known mass of an electron, which is given on the test btw, to solve for v. Hope that helps.


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