When God said "Let there be light", the majestic frequency of life began. Light is composed of both electric and magnetic fields. (electromagnetic radiation). Frequencies are measured as wavelengths. All matter consists of atoms that vibrate at the frequency of it's constituent elements. When a visible wavelength strikes a substance, energy is emitted in the form of light particles called photons, which our eyes detect as color. All of the characteristics of light make possible it's numerous applications such as visual identification, radio and television, the invisible frequencies on the spectrum of light, such as X-rays, microscopes, telescopes, eyeglasses and so on. The functions of light are mostly theoretical, because no single explanation satisfies all it's observable traits. For example, a person viewing a distant galaxy, say 200 million light years away, could be said to be viewing photons 200 million years old, but it could also be said that a photon, that has no mass, exists for zero time, and therefore does not exist at all. Such is the state of scientific inquiry regarding light. Light theory is based on our ability to measure it's variety of compositions and effects. If there was no pattern of behavior to study, none of it's amazing uses could be developed or even theories of it's nature postulated. Make a free website with Yola