Ashok kumar nehra Asked a Question
February 20, 2021 8:45 ampts 30 pts
If a charged pion that decays in 10* second in its own rest frame is to travel 30 metres in the laboratory before decaying, the pion's speed must be most nearly (1) 0-43x 108 m/s (2) 2-84 x10 m/s (3) 2.90x 108 m/s (4) 2.98x 10 8 m/s
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