【多选题】As a car heads down a highway traveling at a speed v away from a ground observer, which of the following statements are true about the measured speed of the light beam from the car’s headlights? More ...
A.
The ground observer measures the light speed to be c + v
B.
The driver measures the light speed to be c
C.
The ground observer measures the light speed to be c
【单选题】Consider these situations: (i) a ball moving at speed v is brought to rest; (ii) the same ball is projected from rest so that it moves at speed v ; (iii) the same ball moving at speed v is brought to ...