The light from the sun to reach the surface of the earth takes about _____.
It takes time 8 min for light to reach from the sun to the earth surface. If speed of light taken to be 3 × 108 ms−1, find the distance from the sun to the earth in km.
The earth takes 24 h to rotate once about its axis. How much time does the sun take to shift by 1º when viewed from the earth?