Time management is very much important in IIT JAM. The eduncle test series for IIT JAM Mathematical Statistics helped me a lot in this portion. I am very thankful to the test series I bought from eduncle.
Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Ruby negi
this is also a valid reason ..Because schrödiger's equation is itself derived from classical physics, like there we consider energy as K.E and P.E only, where as if we will consider relativistic Case, well u know that, energy is not just kinetic.... as it's mass will depend on velocity, then the time itself is relative, etc.