How can we sure that physical laws are always the same in al

In summary, the question of whether physical laws are consistent throughout the universe cannot be definitively answered. It is an assumption that has been proven to be reliable so far, but as with all scientific principles, it is subject to falsification. While there are different types of laws, such as Newton's laws and thermodynamics laws, there is no evidence to suggest that these laws do not hold beyond our observable universe. Additionally, the fact that the spectra of light from distant sources match those of local sources is a strong indication that the same laws apply universally. Ultimately, until we have evidence to the contrary, we can only assume that physical laws are the same throughout the universe.
  • #1
Garrulo
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How can we sure that physical laws are always the same in all the universe?
 
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  • #2
Garrulo said:
How can we sure that physical laws are always the same in all the universe?
We can't be!
Its just an assumption which has shown to be a good assumption till now and we'll continue to use it till its revealed that its in fact not a good assumption.
 
  • #3
We can never be sure of anything in science. The scientific principle is based on falsification and finding a good description of what we can observe. As Shyan said, it is an assumption that has been working very well so far and it could have been falsified several times over if it was not correct.
 
  • #4
Any information cannot travel faster than light ,so our universe is what we can observe.There is always scope for a possibility of a physical law to change. Newton's laws,Laws of electromagnetism and other laws are holding in this SCENERIO of the observable Universe.
There are other types of laws like Thermodynamics laws which are there holding and there so far is nothing contrary to these.
 
  • #5
It is expected that Newton's laws should be derived out of subtle quantum laws(not sure about exactness of this statement).
General relativity is more General theory of gravitation.
Special relativity reduces to Newtonian concepts at low speeds.
 
  • #6
Garrulo said:
How can we sure that physical laws are always the same in all the universe?
One very strong indication is that we can look at the light from very distant sources and the spectra (apart from the red shift) are identical to the spectra of local light sources. That implies that the same 'laws' about what goes on inside atoms, must apply out there. So if those laws apply, why not all the laws?
 
  • #7
To generalize on what Sophiecentaur said, we can say that we have not seen any evidence of different laws. We can make theories about what lies far out there, but we can't test those theories against evidence.
 

Related to How can we sure that physical laws are always the same in al

1. How do we know that physical laws are always the same in all places?

Scientists have conducted countless experiments in different locations and under varying conditions, and the results have consistently shown that the same physical laws apply. This suggests that these laws are universal and apply regardless of location.

2. What evidence supports the idea that physical laws are consistent everywhere?

One of the key pieces of evidence is the fact that objects behave predictably and consistently under the same conditions, regardless of where they are located in the universe. This suggests that the same laws govern their behavior.

3. Are physical laws the same in different parts of the universe?

Based on our current understanding of physics, yes, physical laws are believed to be the same everywhere in the universe. This is supported by observations of distant galaxies and the behavior of objects in space.

4. How can we be certain that physical laws are universal and not just specific to Earth?

Scientists have been able to study and observe the behavior of objects in space and have found that the same laws apply there as they do on Earth. Additionally, the laws of physics have been derived from fundamental principles that are believed to hold true throughout the universe.

5. Is there any evidence to suggest that physical laws may change over time?

So far, there is no evidence to suggest that physical laws change over time. In fact, the laws of physics have remained consistent and have been successfully used to make predictions and advancements in technology for centuries. However, our understanding of these laws is always evolving and may change as new discoveries are made.

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