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If a spaceship 100 m long when at rest on the earth were to travel at nine-tenths the speed of light its length as measured by an observer on the earth would be what?
Wiki User
∙ 14y ago
First of all, its nose has to point in the direction of motion, or you don't get the
answer you're fishing for. The contraction only occurs in the direction of motion.
If the length of the ship is 100 meters in the reference frame in which it's at rest,
and it then departs at 90% of the speed of light, the same observer in the same
reference frame now sees it contract to a length of 43.59 meters.
Wiki User
∙ 14y ago
The spaceship's length would appear contracted to an observer on Earth due to relativistic effects. The Lorentz contraction formula states that length contraction is proportional to the speed of the object relative to the observer. At nine-tenths the speed of light, the spaceship's length would be greatly reduced compared to its length at rest on Earth.
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