Time Travel: Einstein’s big idea (Theory of Relativity)


To watch the whole documentary in High Quality go to: www.youtube.com Here is a little clip about how time travel can occur. The clip was taken from: The World’s First Time Machine (Discovery Channel). Dr Ronald Mallett


25 Responses to “Time Travel: Einstein’s big idea (Theory of Relativity)”

  1. woyay says:

    and then you travel backwards if there is star heat on the outide yet you remain in normal temperature.. there I’ve figured it out..

  2. woyay says:

    I was thinking I figured out a great time machine please don’t steal my idea I guess..

    both forward and back requires you stand or be inside of a container that always keeps you at a comfortable temperature.. your in a room and the whole room around what your inside changes temperature to either extremely cold and the people wait a while to release you thus putting you into the future or
    you heat the outside up with almost star heat.. which they generated before so…

  3. 4inches4u says:

    I get how time slows down but what about not being able to catch up to the light beam? How can it pass you at the speed of light no matter how fast you go?

  4. steroids87 says:

    @SuperMagnetizer
    The Speed Of Light & “C” Are The Same Exact Terms. They Are One In The Same.( E=MC^2) Also The Speed Of Light Is Not Infinite As You Described It As Photons Which Are The Constituents Of Light Are A Massless Form Of Quanta. (They Possess No Mass; They Weigh Nothing) Your Description Would Be Accurate However If Photons Did Have Any Mass. The Effects You Described Would Hold Some Truth For Humans As We Have Mass, But Moving Most Any Mass At Light Speed Is Practically Impossible.

  5. steroids87 says:

    @homopaskavittu

    The Reason I Type Like This Is Simply Because Of The Fact That It Is My Style. I Am Doing Nothing Wrong. I Am Just Simply Fond Of This Writing Style. As A Side Note; The Comment I Posted Below Me Was Originally Intended For “JohnH216″ I Directly Replied To Him But It Did Not Become Posted Under His Comment. Also… Not To Sound Rude.. But Who Do You Think You Are? Do You Know Me? Do You Know What I Can Or Cannot Do? Anyway.. I Have An MBA In Physics From UCLA. What About You!?..

  6. homopaskavittu says:

    @steroids87

    Typing Like This Really Doesn’t Make You Look Smarter, You Know.

  7. steroids87 says:

    That Is Because The Faster You Move The More Massive You Become; The More Powerful Your Gravity Or The Warping Of The Spacetime Fabric Around You Becomes; In Effect, The Slower Time Passes For You. According To Einstein When You Finally Reach The Speed Of Light You Would Become Infinitely Massive Meaning That You Would Need To Consume An Infinite Amount Of Energy To Maintain That Speed. You Would Need To Consume Something Even Greater Than Infinite Energy To Move Even Faster Than Light.

  8. TheRadar77 says:

    the device with the green flash is supposed to be a cesium clock. they are used to measure variations in time. the green flash is cgi just to demonstrate how it works. the human eye cannot observe the speed photons of light bounce between the lenses of course. time travel is only theoretical for humans because only light particles can approach those speeds since they have virtually no mass. all other particles’ masses become infinite as they approach the speed of light.

  9. littledrago7 says:

    @AL3Xmotodude i was thinkin that :)

  10. AL3Xmotodude says:

    this device at 2:49 is real?? Where can i get one? lol

  11. JohnH216 says:

    How does time change when you move? The clock example didn’t make sense to me.

  12. tigerboy1227 says:

    time travel would never be available to the average person. it is too dangerous. even if the president of the us used a time machine to travel 10 years into the future to see america then it would be like he left for 10 years. so it would be impossible to use a timemachine to fortell your future by yourself. and you cant do anything to change that test score last week because then it would create a paradox. you get the good test score and dont decide to go back in time

  13. Biarry says:

    Ah, 2 minutes in traveler’s frame? Well then, you still couldn’t see yourself back in the past.

    Yes – the trip could take only 2 minutes due to time dilatation, but length contraction would mean the distance your image has to cover shrinks also – to exactly 2 light minutes.

    So by the time you make the trip your past image has already passed your destination, and that telescope would be of no help. You can never outrun your image…

  14. SuperMagnetizer says:

    Faster than light travel is impossible, but faster than “c” travel is very possible. The proper speed of light is infinity, because in its own frame, it goes any distance in zero time. The Universe, from the viewpoint of light, seems to have zero size due to its infinite speed.

  15. castout85 says:

    FTL travel is impossible. Close to light speed travel is possible. Which you would be travelling at the exact same speed as the light that left earth the same time you did. meaning time would stop completely for you. Lets say u travel 10 light years. 10 years would have past on earth as the light took 10 earth years to travel what took you 2 minutes as time for you had stopped. Meaning by the time you get back to earth 20 years would have past and for you it would have been 2 minutes.

  16. Biarry says:

    And let’s say you (current self) shoot a super-powerful laser beam at that moving picture of your past self.

    You’d kill yourself before reaching a place from which you shot a laser killing yourself – a paradox.

    I guess we can forget FTL travel :(

  17. UnderManiac says:

    @mosquitobight Ok, I concede that light, itself, doesn’t experience time. Yes, according to Einstein, if we could go the speed of light, then we’d experience time to be zero too, plus we’d have zero length.

  18. UnderManiac says:

    @mosquitobight Oops, I’m sorry, yes it’s per second, not per hour. Typing error. Not used to typing MPS KPS.

  19. mosquitobight says:

    @UnderManiac

    By the way; your figures for the speed of light should have units PER SECOND, not per hour.

  20. mosquitobight says:

    @UnderManiac

    No I’m not wrong.

    For us the observers, light takes 8 minutes from the sun or say 13 billion years from a galaxy. But for the light, all trips are instantaneous because all distances are zero. From our POV light takes time to get here, but the light itself experiences no time, and neither would we if we could travel with it.

  21. castout85 says:

    And to add to this, lets say you waited at that spot for 10 years. You would essentially see past self begin to travel towards your current self.

  22. castout85 says:

    To put this into another perspective, lets say you travel 10 light years away from earth in a matter of 2 minutes, then take a big telescope and look back at earth. You would be looking at yourself and what you were doing 10 years ago. Because the light from 10 years ago was finally reaching where you traveled in the mere 2 minutes.

  23. SuperMagnetizer says:

    A constant measured speed of light in all inertial reference frames indicates that there must be a measurement error rather than distortions in space or time. Speeds greater than c are possible, but c is merely a locally measured “yardstick.” I am sorry Einstein was wrong, especially since he is so widely worshipped today. I already have a God. How many thumbs down will this get me?!

  24. SuperMagnetizer says:

    The only thing that “gives” is the speed of light. Space and time are unaffected, despite all the theories.

  25. SuperMagnetizer says:

    No, the faster we go the quicker we get there. Even in special relativity (which not everyone believes in), the Universe “shrinks” for you in the direction of travel, allowing you to get there faster. The practical starship Captain would say he flew faster than light.

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