- #1
zimo
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Homework Statement
A 100kev photon scatters from a free electron initially at res. Find the recoil velocity of the electron if the photon scattering angle is 180 degrees.
Homework Equations
Conservation of Energy, Conservation of Momentum
(It is not allowed to use Compton's effect equation!)
The Attempt at a Solution
I've written:
[tex]
\eqalign{
& {{hc} \over \lambda } + m_e c^2 = {{hc} \over {\lambda '}} + {{m_e c^2 } \over {\sqrt {1 - {{\bar v^2 } \over {c^2 }}} }} \cr
[/tex]
[tex]
& {h \over \lambda } = {{m_e \bar v} \over {\sqrt {1 - {{\bar v^2 } \over {c^2 }}} }} - {h \over {\lambda '}} \cr} [/tex]
but as I develop the equations on trying to solve the equations, somewhat it doesn't work out...