Can we craft a theory in which space and time aren’t assumed to exist?
Most of the work done in theoretical physics assumes a space-time, so this isn’t an issue specific to string theory. And there are good reasons for this: without a space-time framework, it is very hard to say anything about the real world.
Can time exists without space?
Time cannot exist without space and the existence of time does require energy.
What does it mean that space-time is not fundamental?
Other theories, such as loop quantum gravity, propose that spacetime is not fundamental. Rather, events and the connections between events is. Space and time is ultimately the product of interconnected things happening and causing one another. Causal set theory is similar in this way.
What is in the nothingness of space?
With no particles or antiparticles, no matter or radiation, no identifiable quanta of any type in your Universe, all you’d have left is the void of empty space itself. To some, that’s the true scientific definition of “nothingness.”
Could time loops exist?
Einstein’s general theory of relativity allows for the possibility of warping time to such a high degree that it actually folds upon itself, resulting in a time loop.
Does time exist in quantum physics?
Time in quantum mechanics is rigid, not bendy and intertwined with the dimensions of space as in relativity. Furthermore, measurements of quantum systems “make time in quantum mechanics irreversible, whereas otherwise the theory is completely reversible,” said Renner.
Why did Einstein say time is an illusion?
As For Einstein
As we saw from Einstein’s quote, he believed that time is an illusion, that both the future and the past are unchangeable, and will play out exactly the way they were meant to.
Is space/time fundamental or emergent?
There have been recent theoretical hints that spacetime should not be thought of as a fundamental concept but rather as an emergent property of an underlying microscopic theory.
Is the theory of relativity wrong?
To compared the photographs taken during an eclipse with photographs of those same stars made at another time is not scientific. Conclusions: Einstein’s proving method for his hypothesis the deflection of light by the Sun is not scientific and deeply wrong. General relativity has been wrong since the beginning.
Is time travel a paradox?
“It would mean you can time travel, but you cannot do anything that would cause a paradox to occur.” According to their research, time travel can be consistent and free of logical paradoxes. However, that requires the outputs of all but two space-time regions to be fixed.
Is time an illusion?
According to theoretical physicist Carlo Rovelli, time is an illusion: our naive perception of its flow doesn’t correspond to physical reality. Indeed, as Rovelli argues in The Order of Time, much more is illusory, including Isaac Newton’s picture of a universally ticking clock.
Can a wormhole exist?
Einstein’s theory of general relativity mathematically predicts the existence of wormholes, but none have been discovered to date. A negative mass wormhole might be spotted by the way its gravity affects light that passes by.
Can you be stuck in a time loop?
But for an extremely small percentage of those who experience déjà vu, that’s not true. For them, it’s an everyday thing. And then, there’s this: One 23-year-old British man, according to the Journal of Medical Case Reports, has been trapped inside what he calls a “time loop” for eight years.
Can time be bent?
So to answer your question, time does not literally “bend”. A massive object modifies the proper time interval around it such that an outside observer would see objects near the mass experience less time and spacetime intervals would have their spatial components modified accordingly.
How do we know time exists?
In its simplest form, the type of change that time measures is that of spatial position of objects relative to each other. This is the fundamental basis of its existence, as observed long ago in the daily changing position of the sun in the sky.
Is time finite or infinite?
As a universe, a vast collection of animate and inanimate objects, time is infinite. Even if there was a beginning, and there might be a big bang end, it won’t really be an end. The energy left behind will become something else; the end will be a beginning.
Does the past still exist?
In short, space-time would contain the entire history of reality, with each past, present or future event occupying a clearly determined place in it, from the very beginning and for ever. The past would therefore still exist, just as the future already exists, but somewhere other than where we are now present.
Is time in Black Hole infinite?
No. It is proportional to the enfolding surface tension commonly called a singularity or quantum gravity. The smaller the singularity, the slower the rate of time. This affects the ability of the black hole to assimilate and increase value short of merging with other black holes.
Are stars infinite?
Answer A : No, the number of stars cannot be infinite.
This number may be very big, but it has a definite value. The same goes for stars. Each of all the stars at the instant t has her own size, and we can give her a name.
What is red shifting?
‘Red shift’ is a key concept for astronomers. The term can be understood literally – the wavelength of the light is stretched, so the light is seen as ‘shifted’ towards the red part of the spectrum. Something similar happens to sound waves when a source of sound moves relative to an observer.
Why is the sky is black?
During the day, sunlight floods our atmosphere in all directions, with both direct and reflected sunlight coming to us from everywhere we can see. At night, the sunlight doesn’t flood the atmosphere, and so it’s dark everywhere in the sky that there isn’t a point of light at, like a star, planet, or the Moon.
What is the red sky paradox?
WHAT’S NEW — The “red sky paradox” refers to the idea that red dwarf stars are the most common type of star in the universe, outnumbering stars like the Sun by five times, and could potentially sustain life on the planets that orbit them.
What is in a white dwarf?
The white dwarf consists of an exotic stew of helium, carbon, and oxygen nuclei swimming in a sea of highly energetic electrons. The combined pressure of the electrons holds up the white dwarf, preventing further collapse towards an even stranger entity like a neutron star or black hole.
Is our Sun a red dwarf?
The sun is classified as a G-type main-sequence star, or G dwarf star, or more imprecisely, a yellow dwarf.
Can we live in red dwarf?
Modern evidence indicates that planets in red dwarf systems are unlikely to be habitable, due to their low stellar flux, high probability of tidal locking, small circumstellar habitable zones and the high stellar variation experienced by planets of red dwarf stars, impeding their planetary habitability.
Is Proxima Centauri habitable?
Proxima Centauri is known to host one planet for sure—the roughly Earth-size Proxima b, which completes one orbit every 11 Earth days. That puts Proxima b in the star’s “habitable zone,” the just-right range of orbital distances where liquid water could exist on a world’s surface.
Do orange stars exist?
Orange stars are also known as K-Class type stars which are slightly cooler than our own star. Orange dwarf stars are also smaller than our Sun. These orange stars last longer than our Sun. Whilst our star will live for ten billion years of which it is middle-aged, an Orange Star could live for up to 70 billion years.