1.

A \[{{\pi }^{0}}\] at rest decays into \[2\gamma \] rays \[{{\pi }^{0}}\to \gamma +\gamma \]. Then which of the following can happen  [CPMT 2002]

A.            The two \[\gamma 's\] move in same direction
B.            The two \[\gamma 's\] move in opposite direction
C.            Both repel each other
D.            Both attract each other
Answer» C.            Both repel each other


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