patrick.net

http://www.0x9AgZASQ4k

Hmmm, the wavelength of an electron is defined by
w = h / (mv)
but, v < c, so
w > h / (mc)

Planck's constant / (electron mass * the speed of light) =
2.42631024 × 10^-12 meters = 2.42631024 × 10^-3 nm

However, gamma rays go down to at least 10^-6 nm

What gives? Maybe m isn't the rest mass, but the relative mass of the electron. Then as v approaches c, m goes to infinity, so w just has to be greater than zero. The video is unclear about which mass it's talking about.

http://www.fJqpNudIss4