Sunday, April 19, 2015

Does Twin Paradox really exists?

Today in Watssup, there was a discussion on gravity and other stuffs. It kind of felt like re-visiting my school days. And it was fun. Though the discussion ended a few hours ago, I am still having the hangover. And I had to express it somewhere. So here it goes.

From the first time I heard about the theory of relativity, I felt it was flawed. Reason? Its biggest assumption is about a limitation. It says that it is impossible to overtake light. The maximum speed any object can achieve is the speed of light. The first question then is if the sun suddenly disappears, all its mass and the flux it creates in the space time fabric is gone in the blink of an eye, what will happen to earth? Will earth continue to feel the gravitational pull for another 7 min? or will the effect be instant? If it will indeed feel the pull then doesnt it defy the basic law of physics, that the gravitational force is a function of the mass of the two objects (of which the first object mass is now zero)?

If the earth comes out of the gravitational pull in an instant, how did it happen? Is there something travelling faster than light that caused the effect to be instantaneous? Well we can discuss it some other time. We are here to discuss something else. I just wanted to convey that anytime man said something is impossible, the future generations have proved it wrong. I hope this limitation/assumption in Relativity is also proved wrong during our life time.

Now lets talk about the real reason why we are here. The twin paradox. So lets first see what the twin paradox is. Before that lets put forward the concept. The concept is that time for any moving object will run relatively slower. No, thats not a correct statement, lets say that we measure time more slowly when we are moving.

So the postulate is: Lets say we have twins on Earth. We put one of them in a spaces shuttle and send him out at 99.9% speed of light. The other buddy is with us doing the regular chores. Since the spaces traveller is travelling at near speed of light, the clock will tick 95% times slower than in Earth. i.e. People on Earth will age faster. So when the spaces guy comes back after five years, the theory says that he would find that the Earth guy is 100 years old!!! Really??

I believe that when he comes back after five years, he will find that he and his twin are both five years old. Now this is just a theory, dont have any proof. But one thing is for sure, he will not find that his twin is 105 years older. Reason?

Because when we talk about the twin paradox we are always taking only one frame of reference. That of Earth. How about we travel with the space guy? Then we will find that WE the SPACE GUYS are the ones actually stationary. We find that the EARTH is moving at 99.9% speed of light relative to the space shuttle and that THEIR clock is ticking 95% slower. So when the spaces twin looks at his watch he finds that his watch is travelling faster. So after five years, if he is still travelling at the same speed, he would feel that only three months have passed on Earth.

So based on the special theory of relativity, time is relative. Relative to Earth, the spaces twin is aging slowly. But relative to the Spaces twin the one on Earth is aging slowly. This is the real paradox. Some how both these observations should be justified. As of now I dont have an explanation. Also I cannot really justify why the clocks in GPS satellites have to be adjusted forwards ( Shouldnt an observer in the satellite feel that earth's clock is moving slower? ) ?? But i do feel that we are missing something in the twin paradox and that after five years if one comes back, both guys will be of the same age...!!!!:):)

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