Which of the following theories is the most satisfactory about the origin of the universe ?
A. Big-Bang theory
B. Pulsating theory
C. Steady state theory
D. None of these
A. Big-Bang theory
B. Pulsating theory
C. Steady state theory
D. None of these
(a) According to Big-Bang theory of universe, all the constituent of our universe were originally together as a single mass. A big explosion occur at some instant and single mass burst into a large number of fragments moving with different velocities.