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tromagnetic wave; if it passes through a gap, as in Young's experiment, then new
wave fronts are assumed to form at the point of exit.
When light impacts a surface, however, the wave field is assumed to disappear or
collapse to an infinitely small point from which a photon is then generated. These
photons or packets of energy then bounce around an environment in unquantifiable
numbers, eventually making their way into our eyes, striking the rods and cones in-
side, and thereby making it possible for us to actually see the world around us.
Note
It must be noted that these statements are a hugely simplified overview of the
whole amazing process regarding the way light works and its interaction with the
equally amazing human eye. Go to
http://science.howstuffworks.com/life/human-
biology/eye.htm
for more.
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