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Light and the Human Eye
It might perhaps be expected that this discussion should begin by saying what light really is; but this is not possible, since light is more primitive that any of the terms that might be used in an effort to explain it. The nature of light is describable only by enumerating its properties and founding them on the simplest possible principles. As these principles transcend ordinary experience they must be cast in a purely logical (mathematical) form ….
—Encyclopedia Britannica
Acknowledging the statement above, we can say that light is a physical phenomenon that we perceive through our sense of sight. We see the world around us thanks to the light reflected by the objects in it. Such a definition leads us immediately ...
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