Energy of Electrons

[Jaclyn Schwartz 1I]

How would I find the energy of an electron based on the wavelength? This is based on question 13 of sapling

[Christine Ma 3L]

To find the energy of an electron, you have to use de Broglie's equation and plug in Planck's constant, the given wavelength, and the mass of the electron to find v. Then use E=1/2 mv² to find the energy. As a note, you can't use E=hν because that's for calculating the energy of a photon. Hope this helps!

[Jaclyn Schwartz 1I]

Thank You!