What's dipole approximation?

I know what a dipole is but it says i have to use dipole approximation to calculate potential for a point in a electric field caused by a dipole, so what's a dipole approximation?

oh my, he doesn't even know what dipole approximation
is.

http://www.acms.arizona.edu/publicat...jml/node2.html

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oh god! thank you soooo much! it's becoming very clear, arghhhh!
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what do you expect with a question like that mate ;)

something more complicated than that, i need a lot more variables and stuff into it!!! :rolleyes: I mean i know the Electric Charges the positions of them and the position where i need to calculate the potential, that's way too simplified equations at that link

ok then.

taking into account that the electricity is supplied by two small hampster in a wheel connected to a dynamo. and also taking into account that these hampster's are feeling rather hungry and that there is a piece of lettuce dangling in front of them, I would say the answer to you question is 42.

yeah that sounds reasonable, since 7*6=42

that's not quite how i got the awnser I got it by

h*((a*b)/c)+d)) = 42

where

a = 7
b = 6
c = 2
d = 21
and h is how hungry the hamsters are feeling.

Sorry mate, I won't ruin your thread any more, just a little fun. I did do this all at school many a year ago, but that was many beers ago.

Ian

42: possily a little bit too "Hitchhiker's Guide" for such a sensible thread.

what is 2*21 and 3*14?