PSYB51H3 Chapter Notes - Chapter 2: Retinitis Pigmentosa, Mach Bands, Peripheral Vision
Document Summary
Light is energy produced by vibrations of electrically charged material. As a wave (oscillation traveling through medium by transferring energy from one particle/point to next) or photons (tiny particles consisting of a quantum of energy each). >a wave of light moves around the world, a photon is absorbed. Electromagnetic spectrum goes from gamma rays to radio/television waves (short to long wavelengths) >visible light waves have wavelengths b/w 400-700 nanometers. Photons of light can be absorbed (take up light, not transmit). Light hits objects and is reflected (bounces off surface, accounts for that surfaces light appearance) Sometimes light is neither reflected or absorbed, its transmitted through the surface. Sometimes when light goes from air into glass some of the light rays become bent or refracted as its transmitted. The first tissue that light will encounter in the eye is the cornea (thin film on top of the eyeball). Its transparent, most light photons are transmitted through it rather than reflected/absorbed.
