Light takes approximately 8 minutes to travel 150 million kilometres.
Find the average speed of light, in metres per second. Give your answer in standard form.[2]
The star Proxima Centauri is \(4\times10^{13}\) km from Earth.
Find the time, in years, it takes for light to travel from Proxima Centauri to Earth.[2]
[Assume 1 year = 365 days]