[单选题]
A spaceship moves away from the Eartm xpq. k8b.+pth withe: / p*e6tszc lzu0k.z a speed of 0.80c. The spaceship then fires a missile with a speed of 0.50c relative to the spaceship. What is the velocity of the missile meeuez:/ k.z*c0ztl 6s pasured by observers on the Earth if the missile is fired toward the Earth?
A. $0.30 \; c$
B. $0.50 \; c$
C. $0.93 \; c$
D. $1.3 \; c$
Post time 2024-1-14 16:03:04