- #1
kurious
- 641
- 0
In general relativity the equation
t1 = t2 ( 1 - 2 GM/ r c ^ 2) ^1/2
is often mentioned.
If the mass, M, is equal to the mass of the universe - 10 ^ 52 kg -
then r cannot be less than 10 ^ 24 metres without invoking
the idea that a time can be imaginary.
But could an equally valid interpretation be that the universe started
out no smaller than 10 ^ 24 metres?
The temperature of the universe one second after the Big Bang is
thought to be 10 ^10 K, and if the temperature of the cosmic microwave
background nowadays,
is extrapolated back from 10^26 metres to 10 ^ 24 metres, this would
give about this temperature [( 10^26 )^4 / (10^24)^4 x 1000 = 10^11 K
( the term of 1000 allows for redshift of cmbr photons).
The above scenario would mean that general relativity does not break
down at the time of the big bang and so quantum gravity might not be
needed to explain the Big Bang.
t1 = t2 ( 1 - 2 GM/ r c ^ 2) ^1/2
is often mentioned.
If the mass, M, is equal to the mass of the universe - 10 ^ 52 kg -
then r cannot be less than 10 ^ 24 metres without invoking
the idea that a time can be imaginary.
But could an equally valid interpretation be that the universe started
out no smaller than 10 ^ 24 metres?
The temperature of the universe one second after the Big Bang is
thought to be 10 ^10 K, and if the temperature of the cosmic microwave
background nowadays,
is extrapolated back from 10^26 metres to 10 ^ 24 metres, this would
give about this temperature [( 10^26 )^4 / (10^24)^4 x 1000 = 10^11 K
( the term of 1000 allows for redshift of cmbr photons).
The above scenario would mean that general relativity does not break
down at the time of the big bang and so quantum gravity might not be
needed to explain the Big Bang.