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
Did It Again

Forum List | Follow Ups | Post Message | Back to Thread Topics | In Response To
Posted by Jim Bergquist on January 8, 2001 05:11:46 UTC


Consider the following calculations based on energy considerations:

Classically:

E = 1/2*m v^2 - GMm/r = 0

v=c -> r = 2GM/(c^2)


Relativistically:

E = m c^2 - GMm/r = m0 c^2

-> 1 - GMm/r = m0/m -> 0 as v -> c

-> r = GM/(c^2)

This would imply that the relativistic event horizon is at half of the classical distance.






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 1994-2018 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