Identifying the need to use DeBroglie Equation


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J Medina 2I
Posts: 102
Joined: Wed Sep 25, 2019 12:17 am

Identifying the need to use DeBroglie Equation

Postby J Medina 2I » Sat Dec 07, 2019 10:45 pm

What kind of things in a problem suggest that we use DeBroglie's equation?

Haley Fredricks 1B
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Joined: Sat Aug 24, 2019 12:16 am
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Re: Identifying the need to use DeBroglie Equation

Postby Haley Fredricks 1B » Sat Dec 07, 2019 10:49 pm

Any mention of something that has a mass (electrons, protons, neutrons, etc) will use DeBroglie's Equation, while any light/photons will NOT, because they do not have mass.

Isabel Day 1D
Posts: 48
Joined: Fri Aug 09, 2019 12:15 am

Re: Identifying the need to use DeBroglie Equation

Postby Isabel Day 1D » Sat Dec 07, 2019 10:53 pm

You will use the De Broglie equation in most quantum questions when the question asks for either the momentum, frequency, or wavelength of an electron. If you given any 2 of these variables, you can find the other using wavelength=h/mv. You can also find the energy of an electron using this equation and Planck's equation: E=hv.

Sadhana_Dicussion_4A
Posts: 51
Joined: Sat Sep 07, 2019 12:19 am

Re: Identifying the need to use DeBroglie Equation

Postby Sadhana_Dicussion_4A » Sat Dec 07, 2019 11:10 pm

You use de broglie’s equation to find the wavelength of anything that is not light and has a mass since mass is involved in the equation. Examples of these would be protons, electrons, and ions.


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