IS TIME TRAVEL POSSIBLE !!
I've been very interested in astronomy, especially with time. I just wanted to know if humans will ever be able to figure out time travel as well as faster than light travel. (Einstein said nothing can accelerate to speed of light, so how do we do it?)
Literature is full of stories about time travel, and people have imagined countless machines and devices to achieve it. However, most of these rely more on magic than on physics! When you ask me if time travel is possible, I can think of one way to do it based on the laws of physics. And yet, it would only allow one to get to the future, not by getting in a time machine and immediately jumping in the future, but by traveling in a space ship or some other vehicle that could travel at very great speeds.
In order to travel through time, one must travel at the speed of light, or at least at speeds very close to the speed of light. The problem is, as you mention, that it is not possible to accelerate something up to the speed of light. This comes from the theory of special relativity. In that theory, Einstein has shown that as something accelerates and travels at great speeds its mass increases. And the larger the mass of the object, the harder it is to give it a push to make it accelerate some more. So when the speed of the object gets really close to the speed of light, its mass becomes almost infinite making it impossible to actually give it the speed of light (or speeds faster than the speed of light).
I've been very interested in astronomy, especially with time. I just wanted to know if humans will ever be able to figure out time travel as well as faster than light travel. (Einstein said nothing can accelerate to speed of light, so how do we do it?)
Literature is full of stories about time travel, and people have imagined countless machines and devices to achieve it. However, most of these rely more on magic than on physics! When you ask me if time travel is possible, I can think of one way to do it based on the laws of physics. And yet, it would only allow one to get to the future, not by getting in a time machine and immediately jumping in the future, but by traveling in a space ship or some other vehicle that could travel at very great speeds.
In order to travel through time, one must travel at the speed of light, or at least at speeds very close to the speed of light. The problem is, as you mention, that it is not possible to accelerate something up to the speed of light. This comes from the theory of special relativity. In that theory, Einstein has shown that as something accelerates and travels at great speeds its mass increases. And the larger the mass of the object, the harder it is to give it a push to make it accelerate some more. So when the speed of the object gets really close to the speed of light, its mass becomes almost infinite making it impossible to actually give it the speed of light (or speeds faster than the speed of light).