# What does this symbol stand for?

by Lorax
Tags: stand, symbol
 P: 42 4πε0r^2 Thats 4pi (backwards 3 0) R squared. I forget what the backwards 3 o stands for can someone help me out.
 P: 51 Backwards 3_0 thing is 'epsilon nought' or the permittivity constant.
 P: 582 Backwards 3_0 thing = $\epsilon_{0}$
P: n/a

## What does this symbol stand for?

"epsilon zero" i think it's called ... the permitivity of free space or something like that
 Emeritus Sci Advisor PF Gold P: 10,426 $$\epsilon_0 = 8.854187817 \cdot 10^{-12} F/m$$ It's called the "electric permittivity of free space," and commonly pronounced "epsilon-zero" or "epsilon-naught." - Warren
P: 3
 Quote by chroot $$\epsilon_0 = 8.854187817 \cdot 10^{-12} F/m$$ It's called the "electric permittivity of free space," and commonly pronounced "epsilon-zero" or "epsilon-naught." - Warren
lol thank you SO much :P helped me more than you know :P
 HW Helper P: 2,324 A general rule is that weird-looking symbols are almost always Greek letters.
P: 3
 Quote by ideasrule A general rule is that weird-looking symbols are almost always Greek letters.
Knowing what they are and what they stand for are two completely different things

Knowing it's a greek letter lets us know they used it to write letters and the like, it gives us no clue at all as to what it pertains to in physics or other maths.

Obtaining a firmer grasp of the English language will be beneficial to your ability to understand the question that has been asked :)
Emeritus