--%>
Assignment Help - homework help

Define Equivalence principle

Equivalence principle: The fundamental postulate of Sir Einstein’s general theory of relativity that posits that acceleration is basically indistinguishable from the gravitational field. In another words, when you are in an elevator that is utterly sealed and protected from the outside, and hence you can’t "peek outside," then when you feel a force (that is weight), it is basically not possible for you to say whether the elevator is present in a gravitational field, or whether the elevator has rockets joined to it and is accelerating "upward."

However that in practical conditions -- say, sitting in a closed room -- it would be probable to determine whether the acceleration felt was due to the uniform thrust or due to the gravitation (state, by computing the gradient of the field; if non-zero, it would point out a gravitational field instead of thrust); though, these differences could be made randomly small. The idea at the back is the equivalence principle is that it acts about the vicinity of a point, instead of over macroscopic distances. This would be not possible to state whether or not a given (random) acceleration field was caused by the thrust or gravitation by the use of physics by only.

The equivalence principle forecasts interesting general relativistic consequences since not only are the two indistinguishable to human observers, however also to the Universe as well -- any effect which occurs whenever an observer is accelerating must also occur in a gravitational field, and vice-versa.

   Related Questions in Physics

  • Q : Explain Casimir effect Casimir effect

    Casimir effect (Casimir): The quantum mechanical effect, where two very big plates positioned close to each other will experience an attractive force, in the nonattendance of other forces. The cause is implicit particle-antiparticle p

    		•
  • Q : Continuity of equation or Equation of

    Define Equation of continuity or Continuity of equation: An equation that states that a fluid flowing via a pipe flows at a rate that is inversely proportional to the cross-sectional region of the pipe. That is, when the pipe constric

    		•
  • Q : What is Complementarity principle

    Complementarity principle (N. Bohr): The principle that a specified system can’t exhibit both wave-like behavior and particle-like behavior at similar time. That is, some experiments will reveal the wave-like nature of a system,

    		•
  • Q : Plasma globe AD advantages and

    advantages and disadvantages of a plasma globe

    		•
  • Q : Formula for acceleration What is the

    What is the appropriate formula employed to compute the acceleration? Explain in brief.

    		•
  • Q : Explain Correspondence limit or

    Explain Correspondence limit or Correspondence principle? Correspondence limit (N. Bohr): The limit at which a more common theory decreases to a more specialized theory when the situations that the

    		•
  • Q : Describe Wien displacement law Wien

    Wien displacement law: For a blackbody, the product result of the wavelength corresponding to the maximum radiances and the thermodynamic temperature is constant, then the Wien displacement law constant. As an outcome, as the temperature increases, th

    		•
  • Q : Explain the cause of Brownian motion

    Briefly define or explain the cause of Brownian motion?

    		•
  • Q : Atomic model which the Erwin

    Briefly state the atomic model which the Erwin Schrodinger creates?

    		•
  • Q : What is Cosmic censorship conjecture

    Cosmic censorship conjecture (R. Penrose, 1979): The conjecture, so far wholly undemonstrated in the context of general relativity, that all singularities (that is with the possible exception of the big bang singularity) are attended

    		•