- #1
Brianrofl
- 21
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Homework Statement
http://puu.sh/brbpb/3c7573fa32.png
Homework Equations
E = (mc^2 +K + mc^2 + K)
P = E/c
E = mc^2
The Attempt at a Solution
The book says that the momentum/kinetic energy of the electron and positron produced in a pair production is so small that it can be assumed that the electron only holds rest energy.
I just don't know. The question states that they have momentum, but how am I supposed to find that when I'm given so little information? All I know is that the photon has at least 1.02MeV, but how am I supposed to know how much extra energy went towards increasing the electron's momentum?
Thanks.
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