A remote-controlled exploration rover is operating on the surface of a distant asteroid. The rover senses a hazard ahead and immediately transmits a radio signal to the mission control station on Earth, which is 1.8 × 106 km away. Upon receiving the signal, mission control instantly sends a command back instructing the rover to halt.
What is the minimum time that elapses between the rover first sensing the hazard and receiving the halt command?
6.0 ms6.0\text{ ms}6.0 ms
12 ms12\text{ ms}12 ms
6.0 s6.0\text{ s}6.0 s
12 s12\text{ s}12 s
198 exam-style questions on CIE IGCSE Physics Electromagnetic spectrum, covering Electromagnetic spectrum. Each one has a worked solution and a mark scheme showing where the marks go.