## Calculating wavelength of an electron

$\lambda=\frac{h}{p}$

Toru Fiberesima 1L
Posts: 63
Joined: Fri Apr 06, 2018 11:02 am

### Calculating wavelength of an electron

When you know the velocity of an electron, how do you then calculate the wavelength?
Thanks

Tiffany Chen 1A
Posts: 36
Joined: Fri Apr 06, 2018 11:02 am
Been upvoted: 1 time

### Re: Calculating wavelength of an electron

You could use De Broglie's equation: lambda=h/mV, where h is Planck's constant, m is the mass of the electron (which is a constant that would be given to you or you could just look it up) in kg, and V is the velocity in m/s.

MariaJohn1D
Posts: 41
Joined: Wed Nov 08, 2017 3:01 am

### Re: Calculating wavelength of an electron

When you know velocity of an electron and need to know wavelength use De Broglie's equation. lambda= h/mv

Molly Oakes 1A
Posts: 30
Joined: Fri Apr 06, 2018 11:04 am

### Re: Calculating wavelength of an electron

You know velocity and I believe the mass of an electron is a constant. Therefore, you have mass, velocity, and Planck's, so you can use De Broglie's equation.

Alondra Juarez section 1E
Posts: 47
Joined: Fri Sep 29, 2017 7:03 am

### Re: Calculating wavelength of an electron

In order to calculate the wavelength you will use the equation λ=h/mv