PSYC 3690 Chapter Notes - Chapter 2: Far-Sightedness, The Peripheral, Presbyopia

• School: York University
• Department: Psychology
• Course: PSYC 3690
• Professor: Alistair Mapp

Document Summary

The distal stimulus is carried in light reflected from the object and into the eye. Stimuli trigger a process that ends up with perception as a result of activity in the brain. Perception starts at the beginning of the perceptual process. The ability to see an object depends on light being reflected from that object into the eye. Vision is based on visible light, which is a band of energy within the electromagnetic spectrum. The electromagnetic spectrum is a continuum of electromagnetic energy that is produced by electric charges and is radiated as waves. between the peaks of the electromagnetic waves. The energy in this spectrum can be described by its wavelength--the distance. The wavelengths in the electromagnetic spectrum range from extremely short-wavelength (10- Visible light has wavelengths ranging from about 400 to 700 nanometers, where 1 nanometer: gamma rays to long-wavelength (104) radio waves.