Free Documentaries Online

AT DOCUMENTARY-LOG.COM YOU CAN WATCH HUNDREDS OF THE MOST INTERESTING, POPULAR AND FULL-LENGTH DOCUMENTARIES.
NO REGISTRATION OR ANYTHING ELSE IS NEEDED! VISIT US EVERY DAY TO WATCH FREE ONLINE DOCUMENTARIES!

Documentary Updates by Email

    Sign up to get new documentaries to your Email

Week's Popular Documentaries


  • Twitter


    • Recent Comments...

    Documentaries

    Newest Documentaries

    Editor's Picks

    Links

    • How Long Is A Piece Of String?

      1 Star2 Stars3 Stars4 Stars5 Stars (15 votes, average: 4.67 out of 5)
      Loading ... Loading ...

      How Long Is a Piece of String? It seems like a relatively easy question to answer, doesn’t it. I mean pull a ruler or measuring tape and measure its length. The truth is, it is actually a more complex question as viewers will see in this documentary. Alan Davies embarks on an interesting adventure in this film to answer what many think is a simple question, How Long Is a Piece of String?

      Davies pays Marcus du Sautoy, a mathematician a visit to answer his question, but that leads to a series of more questions. He then heads to the National Physics Laboratory. Still unable to answer the question as Marcus suggest this piece of string could actually be infinitely long, crediting the theory of fractals.

      Davies travels from the theory of fractals to Quantum Mechanics as he speaks with a physics teacher about measuring the piece of string in atoms. He then examines the theory of Quantum Mechanics in greater detail to determine if the string can actually be in two places at once. Are you getting confused yet? Davies sets out on many adventures in this fascinating film to answer the question, How Long is a Piece of String? Will he find his answer or is the answer simply to complex? Find out by watching the film.

      please share:
      Published on February 1, 2010 · Filed under: Cosmology, Physics

      You may be interested in:

      1. Go Forth and Multiply
      2. The Black Hole War
      3. Do You Know What Time It Is?
      4. Parallel Universes
    • Jason

      Fairly good doc. The best bits were at the end where quantum mechanics in nature was discussed. I definitely want a ruler that measures in ancient units now too. lol

    • Falcon Heene

      I liked this documentary quite a bit.

      Seth Lloyd is now my new favorite scientist.

    • dwyane shaw

      very good. I kept expecting to here some conjecture on Zeno's Paradox's, and was pleasently surprised when they avoided it.

      I like these doc's that explain complex concepts in simple terms. But its a little disheartening when I still can't quite grasp it

    • sher abbas

      great documentary about the basic measurement
      giving the idea,

      THERE ALWAYS A PLENTY OF SPACE AT THE BOTTOM

    • Tiago C.

      Although infinity "both ways" raises some serious issues.

      If the space between me and the nearest wall is infinite then how the hell am I able to reach it?

    • Rossman

      Interesting subject, really makes you think about what everything is made out of…

      The guy is not really funny though, at times he comes off as a little dense.

    • aj

      shrodinger was autrian ;)

    • Anon

      This is pretty good for a documentary aimed at laypeople, but one thing bothers me no end. Electrons do not ORBIT the nucleus of an atom. That is the bohr model of the atom and was proven wrong in the 1920s, but most people still think it's true because a lot of teachers – like the physics teacher in this doco who agreed that they do orbit the nucleus – think that it's simpler and easier to understand, as if laypeople are too dumb to understand what's actually going on, and other teachers were taught the old model and don't themselves know of the new one. When drawn, btw, the new model looks more like this -> http://web.rollins.edu/~jsiry/atom-quantum.jpg. The electrons zoom around, being both particles and waves, spending most of their time in those dumbbell shaped spaces, which are the orbitals. The highest energy electrons, rather than those on the outermost orbit in the bohr model, are the valence electrons.

    • The Tay

      i agree with that whole heartedly. and this is a common thing with most docs. they tend to be made by people who mean well, and even have visionary intentions, but sometimes the simple facts fall through, however well informed or researched they are. its probably going to be that way until brad pitt, or megan fox signs on to host one or two (you know…budget). its kind of sad, really. these kinds of educational, and entertaining docs are almost the food for the intellectual masses. its what build, and bolsters the ranks of the scientifically interested.

    • Erin

      the guy at the end his laugh is sooo aweful

    • Johnny Stallion

      Video doesn’t work anymore

     
    Designed by 110Words InfoZoft
    Copyright © 2012 · Watch Documentaries Online - Privacy Policy - Contact