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 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...

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...

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...

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

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) =...

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

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

{\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...

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...

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

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

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

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

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...

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

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

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

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

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...

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

Foundations of Physics, July 2001, vol. 38, no. 7, pp. 659–664 Pryce, Maurice Henry Lecorney; null, null; Dirac, Paul Adrien Maurice; null, null (1997). "On...

MinutePhysics. November 27, 2012. Retrieved October 19, 2017 – via YouTube. Null Island: The Busiest Place That Doesn't Exist. MinutePhysics. July 7...

\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...

This glossary of physics is a list of definitions of terms and concepts relevant to physics, its sub-disciplines, and related fields, including mechanics...

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...

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

testing is based on rejecting the null hypothesis when the likelihood of the observed data would be low if the null hypothesis were true. If multiple...

In physics, a wave vector (or wavevector) is a vector used in describing a wave, with a typical unit being cycle per metre. It has a magnitude and direction...