Human ability to travel through time

The main characters in "Doctor Who" films, "Star Trek" and "Back to the Future" can be used to go to the past or future, ready to participate in new adventures.

However, many florists warn that real-time travel efforts will be fatal for anyone who wants to do it.

Dilation of time

Albert Einstein said that time is just an illusion and relative. He envisions a four-dimensional structure called space-time, in which space consists of three dimensions - long, wide, high - and time is the fourth dimension. According to Einstein's special theory of relativity, time to slow down or faster depends on the speed of the person moving compared to the object chosen as the landmark. If traveling at nearly the speed of light, a person inside the spacecraft will age much slower than its twin on Earth.

Both wide and narrow relativism has been demonstrated by GPS satellite technology (global positioning system) with an extremely accurate time meter. Because the speed of movement of satellites is quite fast compared to observers on the ground, the clocks mounted on satellites tend to run slower on Earth about 38 microseconds per day. This effect is called.

Many scientists believe that we can build time travel machines.(Artwork: cgmagonline.com).

Feasible theory

We can travel back in time if we can move faster than the speed of light - ie 299,792 km / sec in a vacuum, according to the US Aerospace Agency (NASA). However, Einstein's equations show that an object moving at the speed of light will have infinite mass and zero length. This may seem absurd, although some other scientists have expanded Einstein's equations and said that faster than light is possible.

Another possibility is the creation of a wormhole connecting different positions in space-time. Einstein's equations show that they exist, but will collapse very quickly and are only suitable for very small particles. In addition, the current scientific community has not really observed these deep holes. The technology to make a wormhole goes far beyond anything we have today.

While Einstein's theory shows that time travel is extremely difficult, some scientists have proposed alternatives to go to the past and the future. Frank Tipler - American astronomer - proposed a machine called the Tipler. In it, people will take 10 times the mass of the Sun, roll it into a very long and very thick cylinder. After rotating this cylinder at a rate of several billion revolutions per minute, it will create no-time twisting effects. A spacecraft spiraling around the cylinder can return to the past. However, this method has limitations, for example, cylinders need infinitely long, the new machine works.

Another possibility is to move the spacecraft around a black hole . "Astronauts flying near the black hole only spend half the time compared to those who are far from the black hole. Spacecraft and crew will travel through time. Imagine them flying around the hole. Black for 5 years, in other places, it has been 10 years, when they return, everyone on Earth is 5 years older than they are " , - said the famous British physicist.

To travel to the past or future, we can also use a device called a time machine. The study of time machines often involves bending space-time until the time line goes back to itself to form a loop, technically called "closed time curve." private". To do this, the time machine needed a strange form of material that had "negative energy density" and had odd properties, including moving back to normal matter when pushed. Theoretically, this kind of matter can exist but only in small quantities to build a time machine.

will give the answer?

Apart from the physical problem, traveling through time can make some paradoxes. If things go on as in the film depicts - you travel to the past, kill your parents or grandparents - the main storyline of 'Terminator' - or interfere with their relationship - like the movie 'Back to the Future' - so that I will never be born - according to some physicists, although you are not born in a parallel universe but still born in another universe. Some scientists believe that photons that make up light tend to be consistent in time, which will hinder your plan.

People may not be able to survive the journey to the past or the future. If we want to move close to the speed of light, we need a centrifuge spinning with tremendous speed, but that will be deadly, Jeff Tollaksen - professor of physics at Chapman University (USA) - giving know.

While it seems impossible - at least in the sense that humans can survive - future advances in quantum theories will provide some knowledge of how to overcome the paradoxes of traveling through time. Up to that point, we needed to solve the mystery of how certain particles could communicate instantaneously with each other, faster than the speed of light.