Why do we believe that physics applies to everywhere?

Answer 1

We want to devise physics such that it describes everything.
like "if apple falls, orange falls, then all friuts fall.;
if stones fall you fall,asteroids fall, paper falls , then every material we know, falls".

We modify laws to some extent if certain facts contradictory were discovered
like galaxies separate from each other
then we modify newtons laws (MOND as some call it) TO MAKE IT ACCOUNT for tendency of objects to saperate at large dist.(its still incomplete)

We still do not believe that Physics "as it is now" APPLIES everywhere and we require something like Theory of everything to universally apply.
For example laws break down inside black hole.
we still cant APPLY physics to explain why corona of sun is much hotter than its surface
There are many more of such at Link cited below .Do check it out

So ., We not only believe so ,But thats the way we want our Physics to be...!

Answer 2

Interestingly, some physicists don't believe that. Something called gauge symmetry has been invoked to make mathematical solutions easier to come by. Plus, there has been some evidence that gauge symmetry does exist, at least for some fundamental quanta. And one of the fundamentals of gauge symmetry is that the laws of physics apply to everywhere in the known universe.

That being said, there are some physicists who suggest that the laws of physics in our universe may not apply to outside our universe. And, more likely, they may not have applied to the earliest times of our known universe (e.g., shortly before, during, and after the big bang).

For example, just shortly after the BB, all forces were one according to most cosmologists. But now, we ID four fundamental forces: strong and weak atomic, EM, and gravity.

Clearly the laws of physics just after the BB when there was but one primordial force were different from now when there are four forces. A major thrust of string/M theory is to reintegrate the four forces mathematically to show the laws of physics applied way back then. So far, there has been no validation of that theory.

Then, as several answers suggest, there are the black holes. No one really knows what goes on inside. But, thus far, all the WAGs I've seen suggest things using the known laws of physics in our universe.

For example, under extreme gravity, like the center of a black hole, time virtually stands still. But that's according to Einstein's relativity and time dialation under gravity. An effect we've observed through gravitational lenses. So, for that WAG, what goes on inside the black hole can be explained by our universal laws of physics.

So, to answer your question directly...we don't. But the exceptions, like outside our known universe are not something most physicists need to take into consideration.

Answer 3

If the VanWallen force fails for a millaseond every atom in the universe will fly apart.
If you are using a computer you are using laws of physics discovered by Volta, Ampree Tesla, Eddison, William Shockley, John Bardeen and Walter Brattain.
If you drive a car then you have Newton among others to thank.
The list goes on for ever.

Answer 4

We don't. We observe physics laws to hold everywhere we have looked and extrapolate that they will continue to hold elsewhere assuming everything else is equal. That being said, the laws of physics do not hold inside a black hole for example, nor would they apply before the big bang and so we don't believe the laws of physics apply everwhere.

Answer 5

Physics (Greek: φύσις (phúsis), "nature" and φυσικῆ (phusiké), "knowledge of nature") is the branch of science concerned with discovering and characterizing universal laws that govern matter, energy, space, and time. Discoveries in physics resonate throughout the natural sciences, and physics has been described as the "fundamental science" because other fields such as chemistry and biology investigate systems whose properties depend on the laws of physics.
-That's the reason it applies to everything.

Answer 6

Because by definition the findings of physical science apply to a unified frame of reference. It is in the nature of science that if a new reference frame is encountered in which the principles apply in different ways, the knowledge base of the sciences will expand to incorporate those differences in addition to the current known principles.

Answer 7

"There are no by-laws of physics," as I say. The laws of physics are universal and must apply without exception, or they must be reformulated to account not only for all phenomena observed before but also for any new observations that appear to violate these rules.

Answer 8

The human brain acts like it's on autopilot all the time, it has to try to explain everything, physic is the only "scientific" way to do that.

Answer 9

because physics is the study of everything in the universe through the language of mathematics.

physics is god.

Answer 10

yes except the 4th demnsion and Obama's logic