where [itex]h[/itex] is the plank constant and [itex]p[/itex] is momentum. I'm assuming the number in eV you were given is the kinetic energy of the electron--you can look up its mass to get it in terms of momentum through
[tex] T \text{(kinetic energy)}=\frac{p^2}{2m}[/tex]
Can you figure how to get the wavelength of it from this?
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