In physics a null is a point in a field where the field quantity is zero as the result of two or more opposing quantities completely cancelling each other...

Look up Null, null, a-null, núll, or Nullus in Wiktionary, the free dictionary. Null may refer to: Nuller, an optical tool using interferometry to block...

In radio electronics, a null is a direction in an antenna's radiation pattern where the antenna radiates almost no radio waves, so the far field signal...

In theoretical physics, null infinity is a region at the boundary of asymptotically flat spacetimes. In general relativity, straight paths in spacetime...

mathematical physics, a null dust solution (sometimes called a null fluid) is a Lorentzian manifold in which the Einstein tensor is null. Such a spacetime...

The theory of relativity usually encompasses two interrelated physics theories by Albert Einstein: special relativity and general relativity, proposed...

a vector space X with an associated quadratic form q, written (X, q), a null vector or isotropic vector is a non-zero element x of X for which q(x) =...

In science, a null result is a result without the expected content: that is, the proposed result is absent. It is an experimental outcome which does not...

{\displaystyle X} is: timelike if g ( X , X ) < 0 {\displaystyle \,g(X,X)<0} null or lightlike if g ( X , X ) = 0 {\displaystyle \,g(X,X)=0} spacelike if g...

trapped. Null hypersurface Raychaudhuri equation Senovilla, Jose M. M. (September 15, 2011). "Trapped Surfaces". International Journal of Modern Physics D....

epistemological importance of the choice of null hypothesis has gone largely unacknowledged. When the null hypothesis is predicted by theory, a more precise...

levitation, Yahoo! News". yahoo.com. "Levitation in Miniature, Null Hypothesis". null-hypothesis.co.uk. Archived from the original on 2011-07-17. Retrieved...

alternative energy conditions in common use: The null energy condition stipulates that for every future-pointing null vector field k → {\displaystyle {\vec {k}}}...

[ˈdɔʏtʃə fyˈziːk], lit. "German Physics") or Aryan Physics (German: Arische Physik) was a nationalist movement in the German physics community in the early 1930s...

violation of the averaged null energy condition. Quantum effects such as the Casimir effect cannot violate the averaged null energy condition in any neighborhood...

distribution functions of two samples. The null distribution of this statistic is calculated under the null hypothesis that the sample is drawn from the...

{E[{\vec {X}}]^{a}}_{a}} to be negative even if the Null Energy Condition holds. "The Nobel Prize in Physics 2020". NobelPrize.org. Retrieved 6 October 2020...

In theoretical physics, the hierarchy problem is the problem concerning the large discrepancy between aspects of the weak force and gravity. There is...

modeling spacetime, where tangent vectors can be classified as timelike, null, and spacelike. In differential geometry, a differentiable manifold is a...

two results: either the null hypothesis is rejected (which however does not prove that the null hypothesis is false), or the null hypothesis cannot be rejected...

dynamic Einstein field equations. Mathematically a Killing horizon is a null hypersurface defined by the vanishing of the norm of a Killing vector field...

\alpha } , is the probability of the study rejecting the null hypothesis, given that the null hypothesis is true; and the p-value of a result, p {\displaystyle...

stationary aether. In addition, the Michelson–Morley null result was further substantiated by the null results of other second-order experiments of different...

the null hypothesis. The test of significance is designed to assess the strength of the evidence against the null hypothesis. Usually, the null hypothesis...

the physics in a 3D space d s 2 = d x 1 2 + d x 2 2 − c 2 d t 2 , {\displaystyle ds^{2}=dx_{1}^{2}+dx_{2}^{2}-c^{2}dt^{2},} we see that the null geodesics...

called a null-homotopy.) For example, a map f {\displaystyle f} from the unit circle S 1 {\displaystyle S^{1}} to any space X {\displaystyle X} is null-homotopic...

an alternative to an idealized null hypothesis of no relationship between two data sets. Rejecting or disproving the null hypothesis is done using statistical...

In physics, Minkowski space (or Minkowski spacetime) (/mɪŋˈkɔːfski, -ˈkɒf-/) is the main mathematical description of spacetime in the absence of gravitation...

theories more likely to be falsified in physics but less likely to be falsified in soft psychology, as the null hypothesis is always false since any two...

Lorentzian metric η = ηab by defining and examining the so-called "principal null directions". Let us explain this. The bivector Fab yields a skew-symmetric...