An observer A sees an asteroid with a radioactive element moving by at a speed = 0.3 c and measures the radioactivity decay time to be TA. Another observer B is moving with the asteroid and measures its decay time as TB. Then Ta and TB are related as below VITEEE 2008] (a) TB < TA (b) Tg=Ta (c) TB>TA (d) Either (a) or (c) depending on whether the asteroid is approaching or moving away from A.
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