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3- A spaceship approaches the Moon, traveling at 0.5c with respect to the
Moon. Its crew shines a laser at the Moon. The beam strikes a lunar mirror
and is reflected back to the ship. The crew on the ship will measure the speed
of the reflected beam to be
(a)
2.0c
(b) 1.5c
(c)
(d) 0.75c
Th

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