Source: "Inverse Square Law" This animation, originally created
for a KET distance learning physics course, explains the
mathematical formula for the Inverse Square Law by demonstrating
how the brightness of light changes with the distance from a
source in one, two, and three dimensions. This animation can be
viewed in segments or as a whole. Have you ever noticed that
light from a flashlight seems much brighter when it shines on
something nearby than when focused on something far away? Maybe
you’ve also noticed that when you use spray paint the thickness
of the coat is related to how close you hold the can to the
wall. These effects are due to a physical property known as the
Inverse Square Law, which states that the strength of a given
physical quantity is inversely proportional to the distance from
the source squared or I → 1/d2 (I=Intensity). Inversely
proportional means that as distance increases, intensity
decreases. The most well-known story about the Inverse Square
Law comes from one of the most famou