PSYB51H3 Chapter Notes - Chapter 2: Peripheral Vision, Photopic Vision, Lateral Geniculate Nucleus
Document Summary
The first steps in vision: from light to neural signals. Light form of electromagnetic radiation (energy produced by vibrations of electrically charged material) 2 ways to conceptualize light: wave, stream of photons, tiny particles that each consist of one quantum of energy. Radio and television waves long wavelengths. As light reaches the atmosphere from space, some of the starlight"s photons are absorbed, while some light is scattered by different particles. Most photons make it through the atmosphere and hit the surface of an object. If the ray of starlight strikes a light-colored surface, most light is reflected. Light that is neither reflected nor absorbed is transmitted through the surface: example, light travelling from air into a glass window, some light rays will be refracted as they are transmitted. Refraction also occurs when light passes from air into water or into the eyeball.
