- #1
SD das
- 20
- 0
if GR is correct about spacetime (expanding of space) then i think time travel in back (back to the past) is impossible...
suppose before 2 billion years ago (from now) the total space (volume) of universe was "X" so, it's clear that the space (volume) of the present universe must be greater than "X" I.e X+Y where y is increased volume (space).
now, suppose Mr.Q is trying to travel back in time (2billion year before from now). so, can he travel back in that time? it's answer is No .because Mr.Q has some Volume
( X+Y= X + volume of Mr.Q+ Z, where Y=Z+vol.of Mr.Q )
and volume of past is fixed and so he can't travel back (there is no extra space for mr.Q in past)
So what do you think?
suppose before 2 billion years ago (from now) the total space (volume) of universe was "X" so, it's clear that the space (volume) of the present universe must be greater than "X" I.e X+Y where y is increased volume (space).
now, suppose Mr.Q is trying to travel back in time (2billion year before from now). so, can he travel back in that time? it's answer is No .because Mr.Q has some Volume
( X+Y= X + volume of Mr.Q+ Z, where Y=Z+vol.of Mr.Q )
and volume of past is fixed and so he can't travel back (there is no extra space for mr.Q in past)
So what do you think?