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robertjford80
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This comes from Paul Davies the Cosmic Jackpot
He says that as "space expands the number of particles contained within a volume of space bounded by the horizon is therefore going up year by year as the horizon expands to encompass more and more matter." I thought that number of 10^80 particles was fixed and it neither increases or decreases.
the radius of the horizon isn’t fixed but increases with time at the speed of light. The number of particles contained within a volume of space bounded by the horizon is therefore going up year by year as the horizon expands to encompass more and more matter — so in the past, this number was smaller. At one second after the big bang, for instance, the horizon encompassed only about 10^86 particles — still too large for the implied inaccuracy to make much difference. At the time of inflation, however, the horizon was a mere trillion-trillionth of a centimeter in radius, and the total information content of a horizon volume was then only about a billion bits. Such a small number of bits represents a very large degree of looseness, or ambiguity, in the operation of any physical laws, including the laws of string/M theory (or whatever theory is supposed to govern the inflationary process).
He says that as "space expands the number of particles contained within a volume of space bounded by the horizon is therefore going up year by year as the horizon expands to encompass more and more matter." I thought that number of 10^80 particles was fixed and it neither increases or decreases.