To the not here nation,


because only I am here.


Eons ago I asked the group to find error in a little book I wrote and posted on the blog of my think atheist page. I knew of one error, a science/math error I learned after the book was copywrite published.


My obvious intent was to have anyone on this site read the little book, "The Odd Average Atheist Bible." If there is any errors I need corrections. Anywho, that doesn't seem popular. That is asking for help.


The error I found is the formula E=mc2 is only valid for matter that has rest mass. The m is strictly rest mass. As photons only when emitted travel at the speed of light they are never at rest. If E=mc2 is used to calculate the mass of photons and energy, infinte mass for the photon result.


But with the formula: E times E = m2xc4 + p2xc2 or E2=m2c4+p2c2 the energy of the photon reduces to E2=p2c2 or E=pc or E = p times c.


p is momentum a valid value for photons. momentum equals "not at rest mass" time velocity.




link for above:

Tags: mass, photons

Views: 16687

Reply to This

Replies to This Discussion

Yeah, it's all right here. Quite interesting, but I guess it doesn't make much sense for most people.

But isn't it really that when doing relativistic calculations you are almost always allowed to choose the frame of reference? If you choose the FoR with the same vector as the momentum then the momentum is zero and the whole second term is zero so E=mc^2. When doing real stuff it isn't always that simple but reducing it makes it fit on a t-shirt better.

Unless you already know the rest mass of the photon, you generally find its energy from the wavelength first. Then you take that and divide by c^2 to get the rest mass (mass equivalence of a photon's energy). To calculate the momentum stored in the EM field; divide E by c. Rest mass by definition has no momentum so equivalence reduces to E=mc^2. So E/c=mc and mc=p for a photon. Or become a theist and just have faith that it all works out.



An Atheist Time Capsule

Started by Belle Rose in Small Talk 11 hours ago. 0 Replies

9 dead, 46 wounded by gunfire in Chicago

Started by Unseen in Society. Last reply by matt.clerke 5 hours ago. 7 Replies

Questions from an old member who hasn't been around in quite awhile...

Started by Rocky Oliver (LotusGeek) in Small Talk. Last reply by Rocky Oliver (LotusGeek) 20 hours ago. 3 Replies

New site

Started by umar in Announcements. Last reply by Ron Humphrey 2 hours ago. 58 Replies


Blog Posts

My Purity Ring

Posted by Michelle Varni on July 5, 2015 at 7:18pm 5 Comments

Services we love!

Advertise with

© 2015   Created by umar.

Badges  |  Report an Issue  |  Terms of Service