- #1

Phynos

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## Homework Statement

Calculate the de Broglie Wavelength of a 1 MeV electron. Express your answer in femptometers.

## Homework Equations

## λ = h/p ##

## p = (2mT + T^2/c^2)^{1/2} ##

## The Attempt at a Solution

basically just plugged everything in.

## λ = \frac{h}{(2mT + T^2/c^2)^{1/2}} ##

## λ = \frac{(4.126*10^{-15}eV*s)}{(2*(0.511*10^6 eV)(10^6 eV) + (10^6 eV)^2/c^2)^{1/2}} ##

## λ = 4.09*10^{-21} ##

Which is way too low. It's supposed to be ##872*10^{-15}##.

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