PSYA01H3 Chapter Notes - Chapter 4.2: Parietal Lobe, Retina, Temporal Lobe
Document Summary
Eye"s main function is to gather light and change it into an action potential. Light radiation that occupies a relatively narrow band of the electromagnetic spectrum. Light travels in waves and vary in length and amplitude (height of wave) Low amplitude = dim colors high amplitude = bright colors. Wavelength distance between peaks of wave (diff. wavelength = diff. colors on electromagnetic spectrum) Long wavelengths correspond to our perception of reddish colors while short w. lengths are with bluish colors. Light waves can also differ in terms of how many different wavelengths are being viewed at once. Back of retina are specialized receptors called photoreceptors where light will be transformed into a neural signal that brain can understand. Having photoreceptors wedged into back of eye protects them and provides them with a constant blood supply, both of which are useful to your ability to see.
