Time Travel - Is it Possible?

[The_Big_K]

Note# Ideas presented here aren't mine :? , just read them somewhere

This question has popped up in my mind so many times. I read somewhere that it is possible! This is how.
Some scientists have discovered that the light waves never die out. Assuming this is true, we can safely say that, at any particular moment, the light rays are beamed into space from all the objects (provided that there are no obstacles in their path).

Now let's say we device some way which enables us to capture these waves! Boom! we'll be able to see the things happened in past!

Well of course we may have to travel faster than light to capture those waves & according to Einstein, this is impossible.

Any crazy ideas about this topic ?

-The Big K-

[rick]

I think time travel is not possible

I remember one of my Physics professor saying no object in the world can travel faster than light. Because as any object approaches speed equal to "C" (the speed of light), its mass approaches infinity. So at the speed of light, an object will have infinite mass

That makes it an impossible phenomenon. I'm not an expert on this topic but could gather some stuff from old physics lectures

I guess I'll keep my mouth shut and keep an eye on this thread.

rick

[odwan]

hi ...
i can`t agree more with rick....
i`ve read it some place... there ae no material in the world that can run or go at speed of light and still have its material shape without changing anything inside it...

u can think on the other direction... if a time machine has invented yesterday then u can travel in time but between yesterday and today. if we agree with that then the day u will see ur self but older then u can say a time machine has been invented, this is an idea of "if we invented a time machine, so in some place in a cirtan time u will have two body with the same person(duplicate but one older) and that is not posiible" .

few days ago afriend said to me: Eddie, if u run very very fast around a tree approching speed of light u will see ur ass ...( iam sorry for bad words )
hahhaha

nice subject...
that`s a small idea from my small brain...
have a nice day The_Big_K and rick ...

[owaisg53]

Hi! All
i dont think it is possible in present circumstances and technology, but in future if we can find the required material from other planets ...

May be good project for our grand childrens..

Hahaha
Owais

[rick]

Originally Posted by odwan

few days ago afriend said to me: Eddie, if u run very very fast around a tree approching speed of light u will see ur ass ...( iam sorry for bad words )
hahhaha

nice subject...
that`s a small idea from my small brain...
have a nice day The_Big_K and rick ...

Eddie, you are right. If you run with speed approaching that of light, you sure will see ur ass . Remember that you can never attain the speed of light. Because at the speed of light the mass of any object will be infinite!
rick - having a nice time already

[PoliBr]

First, a strongly believe that anyone who would join such a forum -Crazy Engineers-, have to belive even, if just in wishfull form, in time travel.

I have no problems in agreing that the speed of light approach will lead to nowhere, I recall that when lim speed -> C , mass -> 0, hence if you aren't a ghost don't go buying you time travel-tickets just yet.

My point is, if this dosen't seems to work, try looking for a new aproach. And believe, there are quite few others. For example Worm Holes. A wormhole is created somehow. An object that goes into one end would come out of the other end in the past relative to the time when it enters.

The energy requierd to built a wormhole big enough for a spacecraft is bigger than the sun's. And we would need some of a still theoretical "exotic matter". We are not even close to such technologies. But is a good way to get around you speed of light problem.

I'm sure there are many other possible approches yet to be discovered. But there are a few known suggestins that we should borrow from physics, the wormhole is just one of those. So, it's way to soon to say that it is impossible.

[Jerry]

Agree

I recall that when lim speed -> C , mass -> 0, hence if you aren't a ghost don't go buying you time travel-tickets just yet.

Well, lim speed -> C (speed of light) , mass -> infinity , size of object -> 0 .

So at the speed of light the mass will be infinite and the size of object will be zero. I guess the time will stop for the object under such conditions.

[sarakhursheed]

What's the shortest distance between two points??

A straight line !!!


No......If we turn the page then there 'll be a shorter path n tht's the concept of a worm hole



what I just narrated is what i saw on TV some guy was explaining abt the time travel.....so tht's the example he gave...I found it very interesting tht's why shared it here..

Wat do u ppl know abt worm hole can any one tell me.....cuz my knoledge is very limited abt it.

[pradypop]

hi guys,

For me time travel is not possible, as we understand physics today.

The fact that no body would exceed speed of light was established with morley-michelson experiment, which laid the foundation for special theory of relativity.

According to newtonian physics application of force to a free body should accelarate it. And constant force means contant accelaration until you meet the damn speed limit.

So what does the force appiled do than. Unfortunately law of conservation of energy plays spoil sport. So Einstein tried to accomadate these three limitations.

This can be adjusted in different ways.
1. F constant, A almost zero so M almost infinity.(F=MA)
2. F constant, M constant, Change in velocitiy almost 0, so t becomes almost infinity. means 1s takes infinite time to complete. In other words time stops.(F=M*delta(v)/t)
3. F constant, M constant, (time)^2 constant, so distance X approaches zero(F=M*(delta)X/t^2).

From point 2, its deduced that time could be stopped in a relative frame.

Only time travel that would be possible would be in a frame which is faster relative to another frame, so time there moves relatively slowly. After a few years if you change to slower frame you may find people born along with you might have lived few more years extra and are older than you.

So no theoritical chances of travels in future or past. At the best you can hold on to your moment while others don't.

[pradypop]

hi sarakhursheed,

The "worm hole" is an energy field which in theory could connect two different frames moving at different velocities.

In slower frame time moves faster and in faster frame time moves slower.

Say good bye to all your friends in slower frame and jump into the hole. You will end up in faster frame. few years later you may pay them visit again and ofcourse you need not spend much on travel. just jump into hole and you might be surprised to see much older friends then they were supposed to be.

hope you got your answer.

[The_Big_K]

a healthy discussion going on here.

more ideas! anyone?

-The Big K-

[crazyboy]

Originally Posted by The_Big_K

a healthy discussion going on here.

more ideas! anyone?

-The Big K-

I am still puzzled that How one can say that spped more than light is not possible...You should say its not done till now...
before 25 years...people must have thought that spped more than sound is not possbile but it is possible isn't it...
whoknow after 26 years speed more than light too.....

comments and shouts are welcome...

--Crazy

[The_Big_K]

I do agree with you CrazyBoy. Stuff which looks impossible today, will be a reality tomorrow.

Few months ago, there few scientists succeeded in slowing down light. Indeed a big achievement.

Who knows but in future, the little mobile phone in your pocket will be able to take you to moon in a second.

-The Big K-

[crazyboy]

Originally Posted by The_Big_K

Who knows but in future, the little mobile phone in your pocket will be able to take you to moon in a second.

-The Big K-

Wild thinking........but its great....atleast we should think that much great--Crazy

[The_Big_K]

Of course! What's wrong in thinking 'Crazy' ? That's why we call ourselves - Crazy Engineers ( a.k.a CEans )

Now, We need more people to drop into these discussions and add some value to the thread. Let's generate more ideas.

-The Big K-