|Dec3-12, 06:17 PM||#1|
string endpoints move at light speed--?
In Zweibach's introduction to string theory I encounter the assertion that the endpoints of an open string move at the speed of light. A few other sources on the web agree with this. But nobody bothers to tell me what the heck it means (not even in http://www.physicsforums.com/archive...p/t-49119.html , where it is stated that only the endpoints move at light speed, not the rest of it).
Where are the endpoints going so fast? Are they just vibrating in a tiny space? Are the endpoints massless, so as not to violate relativity?
What am I missing?
|Dec5-12, 04:33 AM||#2|
But can't you ask the same question for, e.g. gravitons? It's a consequence of the dynamics, so I'm not even sure what the "why"-question means.
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