The concept of TIME-EMIT – Total Increase Of Mutual Energy raises many questions in our minds. The laws of Science do not distinguish between the past and the future. The arrow of time always points from a direction with less randomness towards a point having more randomness. There are three arrows of time :
:. Thermodynamic arrow of time
:. Psychological arrow of time
:. Cosmological arrow of time
According to thermodynamic arrow of time, the direction of time is in the same direction as the increase of entropy. Psychological arrow of time has a definite direction. This is a direction in which we feel time passes. This is a direction in which we remember our past and not the future. Finally, cosmological arrow of time has a direction in which the universe is expanding and not contracting. Speed of light can be considered absolute but TIME is relative. This gave birth to theory of relativity !
The bamboozling questions that arise are :-
.:Q:. Will this arrow of time ever change its direction?
.:Q:. How would the state of our universe get affected?
The biggest problem is that universe is continuously expanding and evolving. In accordance to this evolution, we need to update and develop our laws and theories also. One cannot predict the beginning of the universe because laws fail at the Big Bang singularity. Classical theory ceases to hold good for the universe when the curvature of space-time becomes large because then the quantum gravitational effects become important.
The laws of science are unchanged under the combination of operation – C, P and T
C – changing particles for anti-particles
P – taking mirror image
T – reversing direction of all particles
Overall, we have to run in the backward direction. The laws of Science that govern the behavior of matter under all normal situations are unchanged under the combination of two operations C and P. Life would just be the same (as on earth) on a planet in our celestial neighborhood having inhabitants, which are mirror images of us and are made up of antimatter.
Contracting phase of the universe doesn’t favor existence of intelligent beings. Hence, we would never have the opportunity to ask or observe the reversal of direction of the arrow of time.