Are the laws of nature the same at the begging of time as they are today?

Question

I know the answer lets see how many, bulbs are lit today

Remember the spedd of light would be different at the begging of our universe.

Answer 1

This question makes me think a bit, and I'm not sure of the answer. (It's a good question!) One thing I do know is that the other answers I've seen don't quite match what I'm thinking about. (If one did, I wouldn't answer.)

A yes or no would answer this. But the question begs an explanation, and that's where the difficulty lies.

My inclination is to give a qualified "no" but it's a close call.

The best science so far says the universe began with a particular quantum fluctuation (Weinberg, Guth). It only had to happen once.

On the "yes" side of your question, I'd say that if that event occurred again, then there'd be another universe, and the laws of nature that created this universe can do it again.

But on the other hand, we humans certainly cannot create the conditions of the Big Bang with any foreseeable technology, and furthermore, such conditions of temperature and pressure do not exist even in supernovas.

Which gets us to why I'm inclined to give a qualified "no". The fundamental "laws of nature," as we know them, are based on the four forces -- gravity, electromagnetism, the strong force, and the weak force. Particle physicists have shown that three of the four were once unified, and they theorize that, at still higher energy levels, gravity will fall into place too. Superstring theory (or M-theory) seems to handle that, notwithstanding that we have little hope of replicating the requisite conditions.

So the laws of nature, as we know and experience them today, do not include conditions conducive to the unification of the four forces.

Still, it's theoretically possible.

Now, let's go back further in time ... here I note your remark concerning the speed of light.

It's been a while since I read Guth's inflation book, but I think he calculated that his period of inflation lasted something like 10^(-39) of a second, during which the size of the universe expanded exponentially, thus solving the flatness and horizon problems. The Standard Model of cosmology now includes the inflation hypothesis.

If that's true -- and as far as I can tell, it is -- then at the beginning of time, the laws of nature were decidedly different than they are now. This involves an unstable equilibrium of a Higgs field that lasted a small fraction of a nanosecond -- sort of like balancing a marble on the tip of a pin -- but during that time, the laws of nature were not what they are today.

I guess that's the best I can do at answering your question.

Answer 2

First,as all mortals do, I am constantly begging for time, becuase I know that the grim reaper is just waiting for me.

However, I am going to assume that you mean begining of time, or at the moment of the Big Bang (further assuming that you don't mean some old gray haired fellow saying "Let there be light").

In a word, no.

The laws of nature become that way becuse it must have two qulaifications. It must accurately describe a large class of observations on the basis of a model that contains only a few arbitrary elements, and it must make definite predictions about the results of future observations.

At the instant of the Big Bang, nothing existed except for energy and time, and before that, nothing at all except a massive singularity. At that time, all laws of nature and science would break down because using present laws we could predict nothing. Even now, we are not sure what happened (although we've come a long way) because all we are sure of is that we can't use current laws of science to say what happened. We can only see what is left and make educated guesses.

A whole lot more can be said about this, but simply put, no, the present laws of nature did not work at the "begging" of time.

Answer 3

Beyond the event horizon of the big bang, just as inside black holes, are singularities - locations in "time" and "space" at which the laws of nature that we use to understand the rest of the universe cease to have any meaning. We basically treat the beginning of time as the earliest point at which our laws enable us to ascertain and understand the state of the universe. "In general", the laws are thought to be unchanging over the span of time and space in which they exist.

*However*, a Physics World article from 2003 (sourced) indicates that there may well be variations in one of the dimensionless constants - the fine-structure constant. If this work is (or has been) corroborated by other studies, the constancy of other constants and laws will naturally be brought into question as well. The sourced article is a very interesting read, by the way.

Answer 4

When the universe came into existence,about 10 to the minus 95 second from zero All the parameters for all the laws that exist to-day were established.
The speed of light,the minimum size that can exist and the shortest quantum of time that can exist.
The quantum effect was established which lead to the universe that we experience to-day.
It also capped the maximum size that the universe can ever attain!

Answer 5

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Answer 6

We don't know anything about the very beginning of time right? When t = 0, the laws of Physics break down, like in black holes. But at like t = 1x10^-32 they were the same right? Gravity, light, all of that was the same as it is now.

Answer 7

Time used to beg, at the begging of time, but now it just takes what it wants.

Answer 8

Of course.. nothing changes the laws of nature

Answer 9

Yes.

Answer 10

Feeling clever today?