De Broglie wavelength of a 6.0 eV electron

[MrDMD83]

Homework Statement

What is each of the following?
(a) the wavelength of a 6.0 eV photon
m
(b) the de Broglie wavelength of a 6.0 eV electron
m

Homework Equations

?

The Attempt at a Solution

None so far

 

[stunner5000pt]

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

 

[MrDMD83]

what about the velocity?

 

[stunner5000pt]

what about the velocity?

nevermind use this formula

$$f = \frac{E}{h}$$

and $$c = \lambda f$$

by th way this is probably in your textbook or in your notes...

you can also look this up on wikipedia, for example

 

[MrDMD83]

I've already solved part a. The De Broglie wavelength is given by the equation $$lambda=h/p$$.