De Broglie Equation

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Stef Newell
Posts: 20
Joined: Fri Sep 29, 2017 7:04 am

De Broglie Equation

Postby Stef Newell » Thu Oct 12, 2017 3:03 pm

I'm having trouble identifying when and how to use the De Broglie equation. Could someone please give me an explanation of how to properly use it and when it works?

Justin Chu 1G
Posts: 52
Joined: Thu Jul 13, 2017 3:00 am
Been upvoted: 1 time

Re: De Broglie Equation

Postby Justin Chu 1G » Thu Oct 12, 2017 3:21 pm

Normally I would just look at what information I am given to figure out what equation(s) I should use to solve my problem as, quite often, you can use many different methods to solve a problem. For the de Broglie equation, I think you would use it when given mass and speed of a particle to find its wavelength.

Alex Leve 3F
Posts: 20
Joined: Fri Sep 29, 2017 7:07 am

Re: De Broglie Equation

Postby Alex Leve 3F » Thu Oct 12, 2017 5:03 pm

You may also need to use the De Broglie equation if neither wavelength nor frequency are given, but mass and velocity are given. In such a case, you could substitute in (h/mv) for λ in equations like c=λ*frequency.

Ramya Lakkaraju 1B
Posts: 67
Joined: Fri Sep 29, 2017 7:03 am

Re: De Broglie Equation

Postby Ramya Lakkaraju 1B » Thu Oct 12, 2017 11:29 pm

Another common problem concerning the De Broglie Equation is one in which they give you the wavelength and mass and ask you to calculate the speed. In all these problems, they give you 2 of the 3 variables (Planck's constant is known) and you are asked to calculate the third one.

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