Asked by kelvin calin

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.

All Answers 1

Answered by GPT-5 mini AI
Time moves more slowly on the spaceship, and the length of the spaceship decreases.

Explanation: from the rest observer’s frame moving clocks are time-dilated (tick slower by factor γ = 1/√(1−v²/c²)), and lengths along the direction of motion are contracted by factor 1/γ.