#### Write4U

**Valued Senior Member**

I heard a famous scientist ( forgot name) that any calculation which yieldsHere we are going at itBigtime, reaching downdeep,13.8 billion years,flat outto infinity, which after all exists, just look at all the bothersome lazy 8s in serious equations, right? -- or?

*infinity*as an answer is flawed or at least not usable in physics. So, I looked it up in Wiki and it seems that while infinity may be used in certain calculations, a result which yields

*infinity*would present a problem in offering a justifiable working model.

Physics[edit]

In physics, approximations of real numbers are used for continuous measurements and natural numbers are used for discrete measurements (i.e. counting). It is therefore assumed by physicists that no measurable quantity could have an infinite value,[citation needed] for instance by taking an infinite value in an extended real number system, or by requiring the counting of an infinite number of events. It is, for example, presumed impossible for any type of body to have infinite mass or infinite energy. Concepts of infinite things such as an infinite plane wave exist, but there are no experimental means to generate them

**and**https://en.wikipedia.org/wiki/Infinity#Complex_analysis

andTheoretical applications of physical infinity[edit]

The practice of refusing infinite values for measurable quantities does not come froma priorior ideological motivations, but rather from more methodological and pragmatic motivations[disputed – discuss][citation needed]. One of the needs of any physical and scientific theory is to give usable formulas that correspond to or at least approximate reality. As an example, if any object of infinite gravitational mass were to exist, any usage of the formula to calculate the gravitational force would lead to an infinite result, which would be of no benefit since the result would be always the same regardless of the position and the mass of the other object. The formula would be useful neither to compute the force between two objects of finite mass nor to compute their motions. If an infinite mass object were to exist, any object of finite mass would be attracted with infinite force (and hence acceleration) by the infinite mass object, which is not what we can observe in reality.Sometimesinfinite result of a physical quantity may mean that the theory being used to compute the result may be approaching the point where it fails. This may help to indicate the limitations of a theory.

Logic[edit]

In logic an infinite regress argument is "a distinctively philosophical kind of argument purporting to show that a thesis is defective because it generates an infinite series when either (form A) no such series exists or (form B) were it to exist, the thesis would lack the role (e.g., of justification) that it is supposed to play."

Last edited: