If you think about it, an objects mass cannot increase as it's an extensive property based on its internal structure, which doesn't change with velocity.
Thanks for the help. Will the momentum need a γ correction?
It's from E2=(pc)2+(mc2)2
EDIT:
Is the equation \lambda=\frac{hc}{\sqrt{2E_{k}mc^{2}}} valid?
Homework Statement
The question I have is simple enough: at what energy do an electron and a photon have the same wavelength?
Homework Equations
I know that for a photon, λ=\frac{hc}{E} and for an electron, λ=\frac{hc}{\sqrt{E^{2}-mc^{2}}}
The Attempt at a Solution
I can't just equate...