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

Be the first pioneers to continue the Astronomy Discussions at our new Astronomy meeting place...
The Space and Astronomy Agora
Re: Does Light Have Weight?

Forum List | Follow Ups | Post Message | Back to Thread Topics | In Response To
Posted by Young Lee on September 19, 1997 22:50:53 UTC

: I believe this can be clarified by considering the notion of momentum. Photons do have momentum which adhere to the laws of space-time (and hence gravity or : the "space-time warp"). Photons do have a rest mass (I think as prescribed by E=mc^2 -- please correct me if I am wrong) however, light does not have a true : mass.

Allow me to correct myself. I believe that Photons do not have a rest mass -- they do have momentum. A photon will have energy E and that will translate into momentum by the formula

E^2 = m^2c^4 + p^2c^2

where p is the momentum and m (=0 for photons) is the rest mass.

Follow Ups:

Login to Post
Additional Information
About Astronomy Net | Advertise on Astronomy Net | Contact & Comments | Privacy Policy
Unless otherwise specified, web site content Copyright 1994-2024 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