Q:

What is string theory?

A:

String theory is a theory that attempts to explain and group the four known fundamental interactions of the universe, which are electromagnetism, strong nuclear force, weak nuclear force and gravitation, into one theory. String theory is a model that attempts to elucidate the phenomena of the universe that are incomprehensible under standard models of quantum physics.

At its foundation, string theory utilizes one-dimensional strings with specific frequencies in place of the standard particles of quantum physics. The formulas stemming from string theory predict a multitude of dimensions, which number 10 or 11 in common string theory models but up to 26 in other versions.

These added dimensions, however, “curl up” within the strings. The average size of these strings is roughly a millionth of a billionth of a billionth of a billionth of centimeter, which is much too small to be seen by current or applied particle physics technology. String theory also refers to another fundamental object known as a “brane.” Branes contain multiple dimensions, and, in some theories, the universe exists within a 3-dimensional brane.

String theory is an evolving science; however, all variations of string theory posit the existence of multiple dimensions and attempt to explain the relationship between gravity and quantum physics. String theory was developed in the 1970s to explain the ambiguities associated with physics and the energy behavior of hadrons.


Is this answer helpful?

Similar Questions

  • Q:

    What is the steady state theory?

    A:

    The steady state theory is the cosmological theory that the universe has no beginning or end and is expanding at a uniform rate. It also states that the universe continues to expand while having a constant density and is even with the distribution of old and new objects.

    Full Answer >
    Filed Under:
  • Q:

    What is the theory of relativity simplified?

    A:

    What is often referred to as "the theory of relativity" is actually two theories, general and special, that describe the way the universe works on its largest scale and at its highest energies. The three main premises of the theories are that matter and energy are interchangeable, space and time are difficult to distinguish in calculations and no frame of reference is better for viewing the universe than any other.

    Full Answer >
    Filed Under:
  • Q:

    What is the force that always opposes motion?

    A:

    Friction always opposes motion between two surfaces, although it is not a fundamental force of the universe like gravity. The coefficient of friction is used to describe the ratio of friction between two bodies and the outside force pressing them together.

    Full Answer >
    Filed Under:
  • Q:

    What is the definition of "astrophysics"?

    A:

    Astrophysics is a subdivision of astronomy concerned with the structures and properties of cosmic objects in the universe. Astrophysics deals with the physical nature of terrestrial bodies and stars rather than their movements and positions in space.

    Full Answer >
    Filed Under:

Explore