[ExI] LIGO is back online

[John Clark]

On Fri, Dec 2, 2016 at 5:38 PM, Mike Dougherty <msd001 at gmail.com> wrote:

​>​
>  I don't know how many bits it takes to
> ​
> describe the salient details of a planck volume.


​
Surprisingly it's the Planck Area that's important not the Planck volume
​ as you'd intuitively think​
. The ultimate limit on the amount of information that can be
​stuffed​
 inside a sphere is proportional to the sphere's are
​a​
not its volume;
​
the formula is  I= PI *R^2 *c/G*h*ln2
​
, where R is the radius
​,​
c is the speed of light, G is the gravitational constant
​,​
 h is Planck's constant
​ and ln2 is the natural logarithm of 2
(0.69314
​...). ​

Th
at works out to 4 Planck Areas (1.6* 10^-69 square meters)  to encode one
bit of
​
information
​.​

​John K Clark​











>
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