## De Broglie Lecture Question

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

Isabella Dal Porto 1H
Posts: 80
Joined: Fri Aug 30, 2019 12:16 am

### De Broglie Lecture Question

There was an example in class that said, "Calculate the De Broglie wavelength of an electron traveling at $5.3x10^{6}m.s^{-1}$
. Do you think your calculated wavelength, for electrons with similar velocities, could be experimentally verified/detected in this lab?" The solution was$\lambda = \frac{6.626x10^{-34} Js}{(9.11x10^{-31} kg)(5.3x10^{6}m.s^{-1})}$. Was the mass just used as an example to show when the wavelength could be verified or was it calculated beforehand?

Hannah Lee 2F
Posts: 93
Joined: Thu Jul 11, 2019 12:15 am

### Re: De Broglie Lecture Question

The mass of an electron is me = 9.109383 x 10-31 kg, so that's where the number came from in the answer. It's also on our constants and equations sheets so we don't have to memorize it.

Hopefully this helped!

Isabella Dal Porto 1H
Posts: 80
Joined: Fri Aug 30, 2019 12:16 am

### Re: De Broglie Lecture Question

Thank you Hannah!