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05 November 2010

What is Time & Its Properties - A Question

This post doesn't have an answer. It is just a question :-)

Recently and quite by accident, i happen to watch one of the documentaries on theory of relativity. While i never completely understood the theory of relativity either at school or now, the concept of "speed" and its effects on "time" was slightly making sense. I would like to share a couple of interesting information i gathered in internet and finally my question.

There are many arguments that the time is a recent concept which exists only for past fifteen billion years - the time from which this universe is existing. The existence of universe and the existence of time is key. The time doesn't make sense when there is no universe because universe is made of particles and if there is no universe there won't be particles and hence there won't be "the time".

Here goes another concept. We are in milky galaxy. A galaxy consists of many stars and each star can possibly have many solar systems. In our galaxy itself there could be more solar systems. There are lot of galaxies. All the galaxies form this universe which we are in. There is a theory that says there could be more such universe closer to us that are separated by a different dimension. (not necessarily by unit of space, to put it simply and for the sake of understanding, a dimension can be distance. the universes can be separated by an inch. but it may be possibility that we don't yet invented that dimension).

We have to be clear that time is not years, months, days, hours, minutes or seconds. Time is not related to number of times earth or planet revolves around the sun. They are unit of time that we use to express time.

So, even if we assume that we reasonably understood the concept of time in this universe, how can we define or comprehend time in other universes if there exist any.

Probably, that is why Albert Einstein said - "Imagination is more important than knowledge".

Now, i feel that physics, astro-physics and cosmology together with mathematics is parent of other inventions. Quite intriguing. Finally i would like to end this article with a piece of quote by Albert Einstein.


Guru said...

Famous work talks about time :-) http://www.repeatafterus.com/title.php?i=1012

Lakshmi Narayanan N said...


cool, will take a look.

also, during weekend listened to Stephen Hawking. Since i m a newbie to study his works, was not able to interpret many of his views however at an outset i feel like his work should be highly informative and engaging. more on this in coming months. i feel like physics is totally amazing :-)

Guru said...

May you can get help of Surendra, he is from Physics background, or Bants.. he told he have good reference for Physics !

Sandy said...

Try Halliday and Resnick - a must have book for Physics Lovers.. Its a classical reference and lovers love classics :-)