A spaceship traveling east flies directly over the head of an inertial observer who is at rest o...
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0A spaceship traveling east
flies directly over the head of an inertial observer who is at rest on the Earth's surface. The speed of the spaceship can be found from this relationship: \( \sqrt{1-v^{2} / c^{2}}=1 / 2 \).
The observer is 5 feet tall. According to the navigator of the space ship, how tall is the observer?
(A) \( 2.5 \mathrm{ft} \)
(B) \( 5 \mathrm{ft} \)
(C) \( 3.6 \mathrm{ft} \)
(D) \( 8 \mathrm{ft} \)
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