A communication satellite in orbit is 45 000 km45\,000\text{ km}45000 km from a tracking station on Earth. A radio signal is transmitted from the station to the satellite and is immediately reflected back. How long does it take for the radio signal to travel to the satellite and back to the station?
0.15 ms0.15\text{ ms}0.15 ms
0.30 ms0.30\text{ ms}0.30 ms
0.15 s0.15\text{ s}0.15 s
0.30 s0.30\text{ s}0.30 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.