Light: What Is It and How Is It Directed?

Book: Optics for Technicians

Author(s): Max J. Riedl

Published: 2015

https://doi.org/10.1117/3.2197595.ch1

Abstract

Light is a very narrow portion of the total electromagnetic radiation range, termed the electromagnetic spectrum, which extends between x-rays (short wavelengths) and radio waves (long wavelengths). The visible spectrum, the so-called “optical” portion, which we perceive with our eyes, covers the wavelength region.