Wavelength


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005095564
Posts: 30
Joined: Wed Sep 18, 2019 12:18 am

Wavelength

Postby 005095564 » Sun Oct 13, 2019 8:42 pm

So lets say a problem states the velocity, how do you compute for the wavelength of an electron with just the velocity given?

kpang_4H
Posts: 55
Joined: Fri Sep 20, 2019 12:17 am

Re: Wavelength

Postby kpang_4H » Sun Oct 13, 2019 8:47 pm

You can just divide the speed of light by the given velocity using c=hv

SVajragiri_1C
Posts: 115
Joined: Thu Jul 11, 2019 12:16 am

Re: Wavelength

Postby SVajragiri_1C » Sun Oct 13, 2019 8:56 pm

I think there's a constant for electron mass that you need to use. Then you use De Broglie's equation to find the wavelength.

Salma Fawzi 4G
Posts: 50
Joined: Wed Sep 18, 2019 12:20 am

Re: Wavelength

Postby Salma Fawzi 4G » Sun Oct 13, 2019 9:31 pm

What are the possible units for computing the wavelength?

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

Re: Wavelength

Postby J Medina 2I » Sun Oct 13, 2019 9:59 pm

I think you can use the Mass of electron given in the constants sheet and plug that into the 1/2mv^2 equation which will give you the kinetic energy of the electron. Then you use c=(lambda)v to get the wavelength.


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