[单选题]
A fast spaceship is traveling with a speed of 0.80c. How fast would - / 7fsun.+cxnmkp,nplptk9f95n8 z dvight travel from8 pz59fnv kdt9 the headlights of the ship relative to a stationary observer?
A. $0.20 \; c$
B. $0.80 \; c$
C. $1.0 \; c$
D. $1.8 \; c$
Post time 2024-1-14 16:03:04