TechFocus
Building the Time Machine
Asif Rayhan Rasha
After the famous science fiction, The Time Machine, written by HG Wells in 1895, the concept became a craze for the people throughout the globe. People began to think about it and wonder if time travel is really possible. Would our scientists be able to develop such a machine that can transport us to any wonderful event that took place in the past and give us a chance to experience it once again? Or would it give us the opportunity to visit our future and see where we will be? Can we be able to alter our past and erase the awful moments that had happened or wipe away the dreadful moment that is going to happen? Many questions aroused in the mind of people. But scientists in the 20th century had come up with some original ideas that might allow us for time travelling.What can a time machine do?
According the scientist of the 21st century, time machine is a device that can transport us only to the future, but not in the past. Scientists had developed a model of time machine that can transport us to the future. You will be surprised to know that instances of time travel happen in our ordinary daily life. Time travel happens in everyday Life
If you buy two clocks of same manufacturer, each using same battery and put one clock in the first floor and another in the sixth floor, after a few days, you will observe that the clock in the first floor became slow about a second than the clock at the sixth floor. Why is that? Wouldn't it be surprising? Do you have any answer? But scientists in this century believe that gravity slows down time. Of course, gravity is something you're familiar with. Gravitational force at the first floor is slightly more than at sixth floor. But we don't observe this weird time wrap. Even peoples in an airplanes traveling at 920km/h for eight hours would be twenty nanoseconds (one nanosecond- a billionth of a second) ahead than you! That means they are time travelers! So gravity and speed are the factors to jump ahead of time as we see from the two facts. Time traveling by using gravity
From the previous fact, we had come to know that gravity can be used to build a time machine. But to do that, we need extreme gravitational force that can produce time dilation (extending time). Scientists are confident that if this is possible, than time travel is possible. For this we need only two things, a wormhole and a neutron star. Time traveling using Wormhole and Neutron star
A galaxy consists of many solar systems and stars, Neutron stars, black holes etc. We only know our galaxy (Milky Way) and our neighboring galaxy (Andromeda). A wormhole is a tunnel that would transport us from one galaxy to the other galaxy within a very short period of time by its extreme gravitational power. It can be considered as a shortcut connecting two different places in space. Though we don't have any evidence of wormhole in our galaxy, but theoretically, it is possible. We can also make an artificial wormhole by using particle accelerator. Already CERN (the world's largest research institute in Switzerland) had developed a particle accelerator which is 27km long. After finding or building a wormhole, we have to stabilize the wormhole by using negative energy, produced by quantum mean called Casimir effect, which would prevent the wormhole from becoming a black hole. Than we have to tow one mouth of the wormhole and position it near the surface of the neutron star. Stars like sun had an average life expectancy of about 10 billion years. Our sun would stop its nuclear reaction after 10 billion years. Than it will become a neutron star. It is called neutron star because after the death of the star, the gravitational force would become so strong that the electrons in the atoms of the stars are forced to enter the nucleus and collide with the protons to form neutrons. So only neutron exists in the atom and it becomes a neutron star. The intense gravity at the mouth of the wormhole with neutron star causes time to pass very slowly. Because time passes more quickly at the other mouth, so any object on entering the mouth close to the neutron star would come out through the other mouth at very high speed and escaping the present and it will be a time traveler. Now you might think that if I travel back to future and meet myself (The future me) than what would happen? According to quantum mechanics, infinite number of particles can exist at same time in the universe. It means that a person named John can exist in infinite numbers. So it is not impossible. Now a student might think to jump in future by using time machine, take his exam question paper, then travel back to the moment when he left for the future, and than score good marks in exam. But it is not possible. Because when he travels to future, he cannot travel back to past, as I said: traveling to past will be not possible. But some scientists claim that traveling to past might be possible. Even Albert Einstein said that in some condition, his general theory of relativity might allow to travel past. Even I think that an object moving with infinite speed vertically and horizontally when put under some certain condition can travel to the past. Though we had built particle accelerator, it cannot create subatomic wormhole that survive long enough for particles to execute fleeting casual loop. And still it would take ages to build a next generation spaceship that can tow a neutron star. But modern science had made so many miracles recently like nanotechnology, creation of anti-matter, satellites and hi-tech space-ships that it is not far enough when science would be presenting us the greatest invention of all times - the Time Machine. The information presented in this article was collected from the internet, various books and encyclopedias.
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