ABSTRACT
It should be obvious that a reader reading this page must
be having some sort of interaction with the ink-marks that
define the letters on the page. How is this interaction be-
ing established? Well, if it is evening, we assume that there
would be an electric lamp glowing in the room. Light com-
ing out of that is falling on the page, getting reflected, and
being received by the reader’s eyes. And the reader is read-
ing. In short, the interaction is being established through
light.
