Tuesday, June 30, 2009

The Inverse Square Law

Lots of things obey an inverse square law. That is, the effect goes down (inverse) with the square (square) of the distance; OK?! (law). Gravity is a real biggy. Gravitational force (F) between two objects is given by:
F = Gm1m2/d2
G is the "Gravitational Constant", m1 and m2 are the masses of the bodies and d is their distance apart.
Now, here's a funny one. Matter (the m1 and m2 stuff) distorts space. It distorts linear dimensions (so d will be altered by matter) and it distorts areas too (so d2 will be affected).
Which all adds up to the inverse square law being well dodgy for large masses.
This means that a lot of stuff to do with the universe could be wrong.
Tell your friends.

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