The romance of vision

Abstract

Sight, in a general sense, may be taken to mean sensitivity to light, while in a more restricted but more proper. sense, it means the conscious appreciation of a sensation obtained through the eyes. Sight is therefore the response to light. In our school days we were thought that light was a form of energy and that there was an unbridgeable difference between energy and matter; we now know that the two are really different manifestations of the same thing; both are composed of electrons and protons, the different proportions of each, their affinities and their relative movement, determining the nature of be substance, whether it be light, sound or a piece of stone. We know that light has mass, volume and weight.