Can an electron be at rest?

1. Feb 3, 2005

repugno

Can an electron be at rest?

2. Feb 3, 2005

vincentchan

yes, according the uncertainty principle, $$\Delta x \Delta p \geq h/4 \pi$$, when you completely have no idea where the electron is... it could be at rest......(it's like playing HIDE AND SEEK when you were young)

3. Feb 3, 2005

repugno

Ahhh, so that is what is meant when the de broglie wavelenght is infinite? h/0

4. Feb 3, 2005

vincentchan

yes, $p = hk/2\pi = h/ \lambda$
if the uncertainty of momentum is zero, sure the wavelength will go to infinity. That's also mean you have completely no idea where the electron is.....