![]() And indeed, one of the solutions of the string equations is a force that looks like gravity. This is shown in an extremely schematic way in the illustration to the right.Īs a "unified" theory, string theory attempts to explain all four forces observed in nature. The end result is that we get back to our familiar (3+1)-dimensional world, but there is a tiny "ball" of 6-dimensional space associated with every point in our 4-dimensional universe. If the size of the compact space is of order the string scale (10 -33 cm) we wouldn't be able to detect the presence of these extra dimensions directly - they're just too small. To do this we curl up the extra 6 dimensions into a small compact space. Somehow we need to link the two if superstrings are to describe our universe. In superstring theory's 10-dimensional spacetime, we still observe only a 4-dimensional spacetime. The larger dimensions are what we perceive as the ordinary space and time. Those extra dimensions are the ones which determine the properties of the world we live in. ![]() The only consistent framework to describe those strings implies a 10- or even conceivably an 11-dimension world in which 6 or 7 dimensions are curled up. The consequences of replacing point-like particles by vibrating microscopic strings are enormous. In the current understanding of the theory, those strings are not "made of" anything: they are the fundamental constituent of matter. Each vibration mode corresponds to a different particle and determines its charge and its mass. In string theory, there are no elementary particles (like electrons or quarks), but pieces of vibrating strings. It naturally and inevitably includes gravity as one of the fundamental interactions. This is one of the most attractive features of string theory. In the words of Brian Greene, a professor at Columbia University and author of a book on the subject,"if string theory is correct, the fabric of our universe has properties that would have dazzled even Einstein."Ībove is a closed string mode that is characteristic of a spin-2 massless graviton (the particle that mediates the force of gravity). A world where, in fact, the very notion of space and time is bound to disappear. ![]() It's a world of 10 dimensions, with some curled up at a microscopic level and some "big" dimensions that we perceive as "real." A world where the distinction between space and time is spurious (as taught by general relativity). If the handful of physicists involved in what are called "superstring theories" (or string, for short) are correct, we live in a world weirder than you can probably imagine. More than 40 years later, Einstein is almost vindicated: The long lasting problem of incompatibility between general relativity and quantum mechanics seems to be on its way to a resolution. He didn't succeed and died without seeing his dearest dream realized. For the last years of his life, he worked on a way to reconcile his own theory of gravitation and the quantum description of the world. While quantum theory, the theory of the infinitesimally small, was being tested with accuracy never attained before, he refused to accept that it was the ultimate theory. Went to go and see doctor about lump on scrotum, can i be su Hard lump on my testicle painful right testicle Testicle Lump Near Epididymis lump attatched to string Testicle lump, attatched by cord? im 14 and have found a lump on one testicle small, hard lump on testicle i have a very large lump on my right testicle lump on the right testicle Tube-like hard lump on testicle? LUMP UNDER RIGHT TESTICLE Lump attached to testicle near epidermis Lump on Testicle During Erection I have like a little string in the middle of my left testicle with a lump on the end of it lump growing from testicle Small Hard Painless Lump on Left Testicle Testicle Discomfort Testicle lump and abdominal pain Can Varicocele Veins be felt under/below testicle? Small lump on my left testicle.For the last 20 years of his life, Albert Einstein was something of an oddity in the physics community, like a beloved eccentric uncle whose favorite subject of conversation draws embarrassed looks around the table. ![]() Medium size lump just above left testicle, feels like string 15 and found a small lump on left teste. ![]() Very Worried - Fatty ball/lump located under left testicle. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |