The use of PI

As if that weren't enough,pi is used in particle physics experiments,such as those using the Large Hadron Collider, not only due to its round shape, but more subtly,because of the orbits in which tiny particles move.Scientists have even used pi to prove the illusive notion that light functions as both a particle and an electromagnetic wave,and, perhaps most impressively,to calculate the density of our entire universe,which, by the way,still has infinitely less stuff in it than the total number of digits in pi.