Ratio of masses of electrons moving with a velocity 0.9 times of speed of light and 0.8 times of speed of light respectively are:
√1936
√6481
√8164
√3619
A
√6481
B
√1936
C
√3619
D
√8164
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Solution
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As we know, m′e=m[[1−(uec)2]]1/2 m′e=mc[c2−u2]1/2
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