String tension, is this the correct formula?

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SUMMARY

The correct formula for string tension is T = 1/(2πα'), where α' represents alpha prime. The variable p in the initial formula discussed is identified as π (pi), which is approximately 3.14. This formula is applicable to closed strings, and variations in sources may lead to differences by a factor of 2, which should not be a cause for concern.

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  • Basic grasp of tension in physical systems
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ant0
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I read in a book that tension = 1/(pa'), where a' = alpha prime.

Is this the correct formula for string tension and if so what is p?
 
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Originally posted by ant0
I read in a book that tension = 1/(pa'), where a' = alpha prime.

Is this the correct formula for string tension and if so what is p?

in my book, it is

[tex]T=\frac{1}{2\pi\alpha'}[/tex]

[itex]\pi[/itex] is the ratio of the circumference of a circle to its diameter, approximately 3.14. and if your source differs by a factor of 2 from mine, i wouldn't worry about it.
 
ah, p must be pi then, would that make sense for a closed string then?
 

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