According to a new physics theory, traveling back in time might be possible!

In a recent study by physicists, a new theory regarding the behavior of waves and their relationship with time has been proposed.

Developed by Matias Koivurova and his colleagues at the University of Eastern Finland, this theory adds weight to the idea that the concept of traveling back in time, which is popular in science fiction, may not actually be possible.

This is because the equation developed by the team allows for solutions where time only flows forward and never flows backward in any way.

DOES THE SPEED OF A WAVE CHANGE OVER TIME?

According to a report by Independent Türkçe, the research paper published in the scientific journal Optica assumed that the speed of a wave could change over time. Thus, this formula, called the "accelerating wave equation," could be written.

Light traveling through a vacuum covers a constant distance of 299 million 792 thousand 458 meters every second.

On the other hand, light appears to slow down when it interacts with matter. In fact, this is not a new observation. Standard wave mechanics can describe most of these everyday phenomena.

This phenomenon also lies behind the bending of light as it travels through a glass of water, and even the dazzling separation of waves in a rainbow.

Physicists can describe this slowing down using 19th-century equations related to light and electromagnetism.

However, the sudden change in the speed of light between different media has not been observably measured to a significant degree with physical wave measurements.

The physicists behind the new theory proposed a potential solution to this problem. However, they were only able to do this by first rethinking the fundamental principles regarding the progression of a light wave within a single dimension of time and space.

Koivurova stated, "The only assumption I needed was that the speed of the wave was constant. Then I thought to myself: What if it isn't always constant? It turns out that was a really good question."

Ultimately, starting from the assumption that the speed of a wave can change over time, the team obtained results that align with the theory of General Relativity when they added a constant reference speed to the equation.

TIME FLOWS IN ONE DIRECTION

Imagine a spacecraft being sent rapidly into the depths of space. The passengers on the vehicle experience time and distance differently than observers watching this journey from afar.

This contrast arises thanks to Relativity, a theory that can be successfully tested at any scale.

The implications of the new solution the team brought to the standard wave equation, based on the accelerating wave assumption, were similar to the effects mandated by the theory of Relativity.

Koivurova said, "We showed that from the wave's perspective, nothing happens to the momentum. In other words, the wave's momentum is conserved."

According to the team, it does not matter what the wave in question is. Whether it is in an electromagnetic field, a ripple in a pool, or the vibration of a string; Relativity measurements and the conservation of momentum had to be taken into account in the equation as speed increases.

Moreover, this situation had consequences that might be disappointing for the popular science fiction concept.

Marco Ornigotti from the research team stated, "We found that we could assign a 'proper time' to the wave, which is completely analogous to the proper time in the theory of General Relativity."

Proper time refers to the measure of the amount of physical process a system undergoes. For example, the proper time of an ordinary mechanical clock is measured by the number of rotations of the clock's hour and minute hands.

General G