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17 April, 03:04

Which describes what an outside observer at rest would observe about a spaceship that speeds up and approaches the speed of light?

Time moves faster on the spaceship, and the length of the spaceship decreases. Time moves faster on the spaceship, and the length of the spaceship increases. Time moves more slowly on the spaceship, and the length of the spaceship decreases.

Time moves more slowly on the spaceship, and the length of the spaceship increases.

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  1. 17 April, 06:14
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    The outside observer, at rest relative to the spaceship, would see the spaceship

    get shorter. and the clocks on the spaceship run slower than they should.

    At the same time, the crew of the spaceship, looking back at the observer on

    Earth, would see the observer on Earth get shorter, and the observer's clock

    run slower than it should.

    They would both be measuring what they see correctly.
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