our universe is sitting on a membrane in a higher dimensional
space. It is like we are living in a loaf of bread which has 4
dimensions that we can identify but actually, the bread exists
in 11 dimensions. If our universe is a slice of bread it can have
other slices as well. We can call them parallel universes.
Did M theory explain the gravity properly?
Gravity is different from all the other forces in the universe.
The M theory could provide an answer for this as well. Gravity
seems to be very weak compared to the other forces in the
universe, but this theory suggested that gravity is as strong
as the other forces in the universe. It all has to do with the
shape of the strings. In fact, Before the M theory, we thought
that all the strings are closed loops such as rubber bands but
with the M theory now we could think that we live in a large
4-dimensional membrane, and forces and matter around
us are open-ended strings, while they are attached to the
membrane using their open ends. But the gravity is different.
It has closed loops; so, they can move out of the membrane
as they are not attached to the membrane. If this is true, the
way we can communicate with the parallel universes which
stand in other membranes is none other than the gravity
waves.
If the string theory is the theory of everything it should
solve the big bang theory as well. Did it?
As suggested in the String theory, we are living in a
4-dimensional membrane in a higher dimensional space. So,
some scientists suggest that the ‘big bang’ can be a collapse
between two membranes in the higher dimension, and all
the energy from the collision goes to the big bang. Since they
did a lot of assumptions, most scientists think that they didn't
solve the problem with the string theory as the equations
also don't make much sense. Scientists are still trying to prove
it to this day.
What are the problems with String theory?
The biggest problem with the String theory is that, since
these strings are really small, scientists are unable to get the
evidence to prove them. Since the theory can't be tested in
that way, some say it's not Science, its Philosophy.
Is there a way to prove the String theory?
Currently, there is a little bit of hope of observing the strings.
Fermi-lab & CERN are currently doing researches to find extra
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University of Peradeniya GAUGE Magazine
dimensions, supersymmetry
and "s" particles using their
atom-smashers
(particle
accelerators).
They
are
trying to detect a graviton
escape from a smashing
atom. Still, they have not
succeeded. But in the end,
it can even be a huge waste
of time and money if the
theory is completely wrong.
But Scientists believe that
this much of mathematical
beauty cannot be wrong. If
one day we prove it, it will be
the theory of everything in
the universe.
N.K.B. Lakshan
Madhushanka Bandara,
2nd Year - Department of
Electrical & Electronic
Engineering,
Faculty of engineering,
University of Peradeniya.