We will look at "the time" in various angles in this article.
It is said, today's atomic clock measure time accurately and it may make a error of one second in 5000 years. We know, one day is based on earth's spin and one year is based on earth's revolution around the sun. It is again said, earth slows down slowly. So they add a second to"a year" every few years.
Earth is divided into number of time zones depending upon the appearance of sun at the place. So we have a global average time called Greenwich mean time. In space, earth's time is meaningless. We may need a universal mean time for the future space explorers.
Place ice cube in a beaker. The ice will slowly become water and then vaporize. That is, the molecules become free and move randomly. Hence the thermodynamics says, as the time progresses the disorder increases( entropy). Some asserts that time is forward moving arrow and cannot be reversed.
Einstein treats time as a fourth dimension like length, breadth and height. So one can move forward and backward in time (as one moves along a length), if miracle time machine is discovered one day.
Einstein also says moving clock runs slowly. Suppose a man travels in spaceship close to the speed of light, his time moves slowly(time dilation). When he returns to the earth after sometime, he may be younger than his son!!!.
Big bang theory says that time is born with the birth of universe and no time existed before that.
When we look at the night sky, we see number of blinking stars. They say, star's light that had started hundreds of years ago reaches the earth now. So we see the"history" in the night sky and not the present movement.
Since we do not know accurate and full history of earth from its formation, we take birth of Christ as a "time mark" and measure the elapsed time before and after that mark( BC,AD).
Our body has its own time mechanism called circadian rhythm. Our body knows when to sleep, when to eat etc,. Remember the jet lag.
So take time to think about "time".
It is said, today's atomic clock measure time accurately and it may make a error of one second in 5000 years. We know, one day is based on earth's spin and one year is based on earth's revolution around the sun. It is again said, earth slows down slowly. So they add a second to"a year" every few years.
Earth is divided into number of time zones depending upon the appearance of sun at the place. So we have a global average time called Greenwich mean time. In space, earth's time is meaningless. We may need a universal mean time for the future space explorers.
Place ice cube in a beaker. The ice will slowly become water and then vaporize. That is, the molecules become free and move randomly. Hence the thermodynamics says, as the time progresses the disorder increases( entropy). Some asserts that time is forward moving arrow and cannot be reversed.
Einstein treats time as a fourth dimension like length, breadth and height. So one can move forward and backward in time (as one moves along a length), if miracle time machine is discovered one day.
Einstein also says moving clock runs slowly. Suppose a man travels in spaceship close to the speed of light, his time moves slowly(time dilation). When he returns to the earth after sometime, he may be younger than his son!!!.
Big bang theory says that time is born with the birth of universe and no time existed before that.
When we look at the night sky, we see number of blinking stars. They say, star's light that had started hundreds of years ago reaches the earth now. So we see the"history" in the night sky and not the present movement.
Since we do not know accurate and full history of earth from its formation, we take birth of Christ as a "time mark" and measure the elapsed time before and after that mark( BC,AD).
Our body has its own time mechanism called circadian rhythm. Our body knows when to sleep, when to eat etc,. Remember the jet lag.
So take time to think about "time".
Comments
Post a Comment