A new unit of length is chosen such that the speed of light in vacuum is unity. What is the distance between the Sun and the Earth in terms of the new unit if light takes 8 min and 20 s to cover this distance ?
Given that The speed of light in a vacuum is unity And we want to find the distance between the Sun and the Earth We know that Distance=speed×time Speed is unity = 1 unit /sec Time=8min and 20sec=8×60+20sec=500sec Plug the values we get Distance between Sun and Earth =1×500=500units
