Thank you for the welcome.
You are absolutely correct,I misstyped ##E=\frac{h}{λ}## instead of ##E=\frac{hc}{λ}## the first time and I copy-pasted again.
Yes,assuming a 180° angle makes more sense.I'll see were it goes from here.
Thanks again for your time.
Homework Statement
In Compton scattering,how much energy must the photon have in order for
the scattered electron to achieve relativistic velocity?
Homework Equations
Compton scattering formula: $$λ'-λ=\frac{h}{mc}(1-cosθ)$$
##E=\frac{h}{λ}##,conservation of mass and momentum,possibly...