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# (Solved): Every 2 years, more or less, The New York Times publishes an article in which people claim to have ...

Every 2 years, more or less, The New York Times publishes an article in which people claim to have found and object traveling faster than the speed of light. Many of these reports result from a failure to distiguish what is seen from what is observed - that is, from a failure to account for light travel time. Here is an example: In a laboratory experiment, a neutral-pion

\pi ^(0)

is observed to travel

d=1pm

(pico-meter,

1pm=

{:10^(-12)(m))

before disintegrating. A graduate student looks up the lifetime of a neutral-pion

(t=8.5\times 10^(-17)(s))

and concludes that its speed should be

v=(d)/(t)

. Is the speed

v

faster than the speed of light? If so, find the actual speed of this neutral-pion. (10 points)

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