Prof. Muni Mahendra Kumar
The theory of self-pulsating universe is chiefly based on the theory of expanding universe. Having taken into consideration the phenomenon of expansion of the universe, Friedmann, a mathematician, solved the cosmological equation of Einstein. He found out that the mathematical solution permits two kinds of universe. One of which is called “self-pulsating universe”. When the expanding universe has reached a certain maximum limit, it will begin to contract, it will then shrink until its matter has been compressed to a certain maximum density; it will then begin to expand again and so on through the cycle ad infinitum. Thus the process of expansion and contraction of the universe is repeated over and over again so that the universe is without beginning and end.
Prof. R. C. Tolmann of the California Institute of Technology arrived at the same conclusion independently. He has shown that in certain cases a process of expanding or contracting at a finite rate can be reversible, without tending to the ultimate ‘heat-death’ which would be predicted by the second law of thermodynamics.[1] Prof. Tolmann has assumed that new matter is being created in universe.[2] On the basis of this assumption, he explains the changes of the universal volume which should depend upon the material contents of the universe. Tolmann’s universe is like a self-pulsating balloon in which the cycle of expansion and contraction goes on for infinite time.
