# [ExI] Problem with time travel WAS Faster than light??

The Avantguardian avantguardian2020 at yahoo.com
Fri Sep 30 01:42:52 UTC 2011

```----- Original Message -----
> From: The Avantguardian <avantguardian2020 at yahoo.com>
> To: spike <spike66 at att.net>
> Cc:
> Sent: Thursday, September 29, 2011 11:45 AM
> Subject: Re: [ExI] Problem with time travel WAS Faster than light??
>
> ----- Original Message -----
>> From: spike <spike66 at att.net>
>> To: 'The Avantguardian' <avantguardian2020 at yahoo.com>;
> 'ExI chat list' <extropy-chat at lists.extropy.org>
>> Cc:
>> Sent: Thursday, September 29, 2011 7:19 AM
>> Subject: RE: [ExI] Problem with time travel WAS Faster than light??
>>
>>
>>
>> ----- On Behalf Of The Avantguardian
>> Subject: Re: [ExI] Problem with time travel WAS Faster than light??
>>
>>
>>> ...Actually I have done some calculations and there is indeed a
>> "finest-grained scale" for vacuum. A photon that has a frequency
>> greater
>> than or equal to 5.223 * 10^42 Hz has a wavelength less than its
>> own schwarzchild radius. ...Stuart LaForge
>>
>>
>> Avant, you know I love ya like a brother pal, but I think this is seriously
>> wrong.  To get to that number, you need to work backwards from the
> photon's
>> momentum to get an equivalent mass for a photon.  It's a fun mind
> expanding
>> experience granted.  I did that calculation in college so tragically many
>> years ago (which is why I recognized the number.)  For a few heady hours,
>> thought I had discovered how to unify gravity with QM.  But it didn't
> work
>> out for me.  {8-]

I am sorry it didn't work out for you. Please elaborate. I make no claim
that the number unifies anything. I merely state that it is a number that is the
maximum photon frequency possible in this universe. It is a constant built of
constants: fmax=SquareRoot(c^5/(2*G*h)) where c is the speed of light, G is the
gravitational constant, and h is the Planck constant. Conversely the minimum
frequency possible in the universe is simply H or the Hubble parameter. That is
all.

Stuart LaForge

"When buying and selling are controlled by legislation, the first things
bought  and sold are legislators." - P. J. O'Rourke

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