Velma's rocket ship is moving away from Mort at a speed of 0.75c. Mort fires a laser beam toward her spaceship, observing the tip of the laser beam to move away from him at speed c. Velma observes this laser beam to move past her at a speed of
A) 0.25c.
B) 1.25c.
C) 0.75c.
D) 1.75c.
E) None of the above.

Question

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The Answer of Velma's rocket ship is moving away from Mort at a speed of 0.75c. Mort fires a laser beam toward her spaceship, observing the tip of the laser beam to move away from him at speed c. Velma observes this laser beam to move past her at a speed of
A) 0.25c.
B) 1.25c.
C) 0.75c.
D) 1.75c.
E) None of the above.

Velma's Rocket Ship Is Moving Away from Mort at a Speed