### Frequency shift in Compton scattering

How would one obtain the Compton shift equation if the incident photon and electron were moving in opposite directions to begin with?

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How would one obtain the Compton shift equation if the incident photon and electron were moving in opposite directions to begin with?

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Three disks are spinning independently on the same axle without friction. Their respective rotational inertias and angular speeds are I, w (clockwise); 2I, 3w (counterclockwise); and 4I, w/2 (clockwise). The disks then slide together and stick together, forming one piece with a single angular velocity. What will be the directio

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