Modern Physics
posted by Phil .
(7) Show that if a particle moves at an angle θ with respect to the xaxis with speed u in frame S, then it moves at an angle θ′ with the x′axis in frame S′ with
tanθ′ = sinθ /( γ(cos θ − v/u))
Assume that S′ moves in the +x direction with velocity v with respect to frame S, and that the two xaxes are parallel.
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