Mort stands on Earth. Velma moves away from him in a rocket at 299,000 km/s (1000 km/s slower than lightspeed). Mort sends a laser beam toward Velma. As the tip of the beam passes her rocket, Mort observes the beam to move just 1000 km/s faster than Velma, while Velma observes the beam to move at 300,000 km/s. Whose observation is correct?
A) Mort's
B) Velma's
C) both
D) neither

Question

Quizplus · Accepted Answer

Both Mort and Velma are correct because the speed of light is the same for all observers, regardless of their motion.

Mort Stands on Earth