![]() The most self-consistent string theories propose 11 dimensions 4 correspond to the 3 ordinary spatial dimensions and time, while the rest are curled up and not perceptible. The development of a unified quantum field theory is a major goal in theoretical particle physics, but inclusion of gravity usually leads to difficult problems with infinite quantities in the calculations. ![]() Introduced in the early 1970s in attempts to describe the strong force, string theories became popular in the 1980s when it was shown that they might provide a fully self-consistent quantum field theory that could describe gravitation as well as the weak, strong, and electromagnetic forces. The name comes from the modeling of the subatomic particles in a manner that shows them as small one-dimensional entities that are ‘stringlike’, instead of the usual approach where they are zero-dimensional. Different vibrations of the strings correspond to different particles. String theory or, to be more accurate, string theories are models that attempt to explain and quantify physical properties, such as mass and charge, by describing them as vibrations on loops of strings. String theory is a particle physics theory that attempts to merge the general theory of relativity of Einstein with quantum mechanics. String theory, Any of a number of theories in particle physics that treat elementary particles ( see subatomic particle) as infinitesimal one-dimensional “stringlike” objects rather than dimensionless points in space-time. SpaceNext50 Britannica presents SpaceNext50, From the race to the Moon to space stewardship, we explore a wide range of subjects that feed our curiosity about space!īelow is the article summary.Learn about the major environmental problems facing our planet and what can be done about them! Saving Earth Britannica Presents Earth’s To-Do List for the 21st Century.Britannica Beyond We’ve created a new place where questions are at the center of learning.100 Women Britannica celebrates the centennial of the Nineteenth Amendment, highlighting suffragists and history-making politicians.COVID-19 Portal While this global health crisis continues to evolve, it can be useful to look to past pandemics to better understand how to respond today.Student Portal Britannica is the ultimate student resource for key school subjects like history, government, literature, and more.From tech to household and wellness products. This Time in History In these videos, find out what happened this month (or any month!) in history.#WTFact Videos In #WTFact Britannica shares some of the most bizarre facts we can find.Demystified Videos In Demystified, Britannica has all the answers to your burning questions.Britannica Explains In these videos, Britannica explains a variety of topics and answers frequently asked questions.Britannica Classics Check out these retro videos from Encyclopedia Britannica’s archives.
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