The Visible Spectrum
What we know about light goes back long before film and video were invented, and is the result of the findings of several scientists and engineers. Over the course of time, two fundamental, opposing theories of light gradually evolved and competed for dominance in the field of optical science for centuries before they were integrated into one theory by Einstein and others in the twentieth century.
Sir Isaac Newton described light as being composed of tiny particles (or corpuscles) of radiant matter. Newton’s corpuscle theory, however, accepted largely on the basis of his other outstanding ...