Is time travel possible? What physicists say about that?
Is time travel
possible? What physicists say about that?
Travel to the past is probably
impossible. Hawking and others considered that you could not travel back before
the moment your time machine is built. But to the future? It is possible.
The great 20th century
scientist Albert Einstein two theories called “Special Relativity” and “General
Relativity”. The ideas is too difficult to imagine because the ideas are not
about we experience in everyday life. But scientists have confirmed them.
According to Albert Einstein’s theory
of relativity, when you travel at the speed of light, time slows down for you
relative to the outside world. There’s a speed limit of 300,000 km/s for
anything that travels through space-time, and light always travel the speed
limit through space. “Special Theory of Relativity” say us that space and time
are the parts of one thing that is spacetime. The faster you move, the slower
your clock ticks. If your clock ticks slow according to relativity to ones you
are moving to past.
Suppose you shoot a gun and you
want to see the bullet. Now you have to run faster than the bullet and you have
to stand in front of the bullet. In this way you can see the bullet. According to
relativity your past sound and the rays that reflect from Earth are spreading
with the supreme speed in the space. Now you have to achieve the speed that can
across the rays and the sound. After crossing it if you see behind then you can
see the past. The “General Theory of Relativity” also provides scenarios that
could allow travelers to go back in time.
The famous scientist Stephen
Hawking firstly disagreed with the point of time travel that Einstein
explained. He thought that if time travel will possible then where’s the future
persons. One day he held a party and created an invitation card for future but no
one came from the future in time. And he confirmed that time travel is
impossible. But later he also changed his decision. "If one made a research
grant application to work on time travel it would be dismissed
immediately," writes the physicist Stephen Hawking in his posthumous book “Brief
Answers to the Big Questions”.
Now, the ultimate question is “is
time travel possible?”
Yes, it is possible. One day the
touch screen mobiles, planes were also imagination to us Advances in quantum
theories could perhaps provide some understanding of how to overcome time
travel paradoxes.
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