Why earth take 24 hour for one rotation
Answers
Actually it doesn’t take 24 hours to complete one rotation of Earth! Earth has rotates with a certain speed, by coincidence, the speed and circumference are divisible by 1,2,3,4,6,8 and 12, as any circle, in the past time was not an essence we lived by dark/light and 4 seasons, when human started to divide the 360 degree circle in parts time started, the first day’s were divided by 6 or 8 for purpose of convenience for army, trade and farming, we needed more convenient because time is money! At last it was 12 hours day and 12 hours night(certainly not everywhere though) at the beginning of the modern time we changed it in 24 parts of 60 minutes of 60 seconds. Still it is not perfectly 24 hours, we need to fix it every couple of years by a couple of seconds, anyway a day could have become 16 hours of 100 minutes in one hour, we are now used to 24 hours of 60 minute in one our.
Time is not natural, it is a human invention, born on mars or venus time would be inherent on their circumference and rotation speed. Our time is not the time of an Alien race on a planet many Earth light years away, so if time is different the radio waves are different etc, anyway time is even bigger or smaller because of the total movement of the whole space