What is space-time?

What is space-time?

The time it takes for a signal - which moves at the speed of light through space - to travel from the spacecraft to Earth. From Saturn, one-way light time can range from about one hour and 14 minutes to one hour and 24 minutes.

What is Space-Time and how it works?

Space-time is a mathematical model that joins space and time into a single idea called a continuum. ... But in a relativistic universe, time cannot be separated from the three dimensions of space. This is because the observed rate at which time passes depends on an object's velocity relative to the observer.

How does space-time work?

We all measure our experience in space-time differently. ... First, time appears to move slower near massive objects because the object's gravitational force bends space-time. Public Domain The phenomenon is called "gravitational time dilation." In a nutshell it just means time moves slower as gravity increases.

What is Einstein's space-time theory?

Einstein's theory of special relativity says that time slows down or speeds up depending on how fast you move relative to something else. Approaching the speed of light, a person inside a spaceship would age much slower than his twin at home. Also, under Einstein's theory of general relativity, gravity can bend time.

Can time machine be created?

Travelling in time might sound like a flight of fancy, but some physicists think it might really be possible. BBC Horizon looked at some of the most promising ideas for turning this staple of science fiction into reality. Ron Mallett has a dream: He wants to travel in time. AP

Can we travel to future?

Believe it or not, time travel is possible. In fact, you're doing it right now. Every single second of every single day, you are advancing into your own future. You are literally moving through time, the same way you would move through space.Ordibehe AP

Who built a time machine?

Ali Razeqi says his time machine uses "complex algorithms" to see the future. It's not quite Back to the Future, but a young Iranian inventor claims to have built a time machine that can predict a person's future with startling accuracy.Farvar AP

Is time a concept?

The concept of time is self-evident. An hour consists of a certain number of minutes, a day of hours and a year of days. But we rarely think about the fundamental nature of time, says one expert. The concept of time is self-evident.Farvar AP

Does the present exist?

One way of seeing this is to recognize that the notion of “present,” as sandwiched between past and future, is simply a useful hoax. After all, if the present is a moment in time without duration, it can't exist. What does exist is the recent memory of the immediate past and the expectation of the near future. AP

Is time a physical thing?

Einstein's general theory of relativity established time as a physical thing: it is part of space-time, the gravitational field produced by massive objects. The presence of mass warps space-time, with the result that time passes more slowly close to a massive body such as Earth.Farvar AP

Is time a human construct?

Time is a theoretical construct created by humans for their own purposes. Humans employ the concept of time to measure the gap (interval) between events according to a standard unit of measure - e.g. seconds, minutes.Farvar AP

Is time travel backwards possible?

As for backward time travel, it is possible to find solutions in general relativity that allow for it, such as a rotating black hole. Traveling to an arbitrary point in spacetime has very limited support in theoretical physics, and is usually connected only with quantum mechanics or wormholes.

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.Khor AP

Who created the universe?

A creator deity or creator god (often called the Creator) is a deity or god responsible for the creation of the Earth, world, and universe in human religion and mythology. In monotheism, the single God is often also the creator.

Can time be divided infinitely?

Physical space is often regarded as infinitely divisible: it is thought that any region in space, no matter how small, could be further split. Time is similarly considered as infinitely divisible.

Can the past be infinite?

Since there's no negative infinite number, there's no infinitely past year or earliest year. Each year is separated from any other by a finite number of years (remember that there's no first year).

Why is Infinity impossible?

Aristotle postulated that an actual infinity was impossible, because if it were possible, then something would have attained infinite magnitude, and would be "bigger than the heavens." However, he said, mathematics relating to infinity was not deprived of its applicability by this impossibility, because mathematicians ...

Is there a first cause?

Someone or something must have caused the world to exist. The cause is God, the effect is the world. Aquinas stated that this cause (which is outside our world) is the first cause - that is, the one that started everything.