When did time started? This is where physics and philosophy are fighting

Did Big Bang change time forever? Yes. But was there a time before that? What if time doesn’t exist? There are those who believe everything is in our head.

Ask “time started?” It’s more like asking if the universe of events is infinite than to ask directly about the beginning of something called “time,” says the philosopher Adrian Bardon has

Fundamental equations that determine microscopic behavior have exactly the same way if time has a negative signal. In fact, in quantum physics, the “direction” to which time runs.

If these laws do not care if things go forward or backwards, why does time pass only in one direction? It is with this in mind that some philosophers believe that Time is just a conception we created.

“Compare it with the visual properties of color,” explains Bardon. “Roses are not red. On the contrary, they reflect light in a certain wavelength. Red is a feeling, not a property of the rose. ”

If time is an idea, not an exact and real concept, then time may only have started with the emergence of consciousness.

But the physicists go back to other times, much older, to try to understand the origin of time.

Albert Einstein’s general theory of relativity, basilar to all physicists, says that the background of the universe is a fluid continuum, spacetime, in whichneither space nor time have absolute meaning. In Big Bang, spacetime is distorted at an infinite density point called uniqueness.

But are there even physicists who believe there was a “before the big bang” – have there been an earlier universe? Cosmologist Roger Penrose even proposes that new universes can emerge from universes that do not contract through a dramatic “Resizing” of the entire space-time.

Stephen Hawking and James Hartle suggested that time was once a common dimension such as space, which turned into space-time with Big Bang.

Another idea already proposed, more bizarre, is that The space-time is made of particles. If so, they could be arranged at different phases, such as vapor and liquid water.

Theoretical physicist Shahn Majid, positions himself a little among philosophers, which tend to think that time can be a conception, and the physicists, who seek their origin: time exists naturally in Many possible states at the same timebut it is only visible to an observer in a single state, a kind of “”.

And it still leaves another challenge: “If time itself is quantum mechanical, whose time is it?”