Back to Home

Blackholes Forum Message

Forums: Atm · Astrophotography · Blackholes · Blackholes2 · CCD · Celestron · Domes · Education
Eyepieces · Meade · Misc. · God and Science · SETI · Software · UFO · XEphem
RSS Button

Home | Discussion Forums | Blackholes I | Post
Login

Be the first pioneers to continue the Astronomy Discussions at our new Astronomy meeting place...
The Space and Astronomy Agora
Its Always Wise To Understand Something..

Forum List | Follow Ups | Post Message | Back to Thread Topics | In Response To
Posted by Bruce on October 2, 2001 03:53:41 UTC

before you start looking for flaws. Alex cleared it up. Here is an example of the equivalence principle where all the local physics is done using SR. From special relativity

E = m/(1-v^2)^1/2 [where m = the mass of an object (in meters {geometric units}) at rest, at infinity in flat spacetime]

v^2 = 2M/r [where M is the mass of a spherically symmetric object in meters]

So for the Schwarzchild geometry we can write the energy equation

Eshell = E/(1-2M/r)^1/2

What will be the measured energy of a laser pulse received at Eshellr2 sent from Eshellr1

Eshellr1(1-2M/r1)^1/2 = E = Eshellr2(1-2M/r2)^1/2

Eshellr2 = [Eshellr1(1-2M/r1)^1/2]/(1-2M/r2)^1/2

Substitute 2M for r1 in 2M/r1 and you get the general relativistic solution for 'nothing, not even light can escape the event horizon'.

Follow Ups:

Login to Post
Additional Information
Google
 
Web www.astronomy.net
DayNightLine
About Astronomy Net | Advertise on Astronomy Net | Contact & Comments | Privacy Policy
Unless otherwise specified, web site content Copyright 1994-2021 John Huggins All Rights Reserved
Forum posts are Copyright their authors as specified in the heading above the post.
"dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET"
are trademarks of John Huggins