PSYC 2390 Chapter Notes - Chapter 2: Retinitis Pigmentosa, Ciliary Muscle, The Blind Spot

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Visual perception begins with light reflected from an object into the eye. Step 2 (seeing in focus): light is reflected and transformed to create an image of the stimulus on the retina. Step 3 (seeing in dim light): receptor processes - receptors transform light into energy. Step 4 (seeing fine details): neural processing - signals travel im a network of neurons. The ability to see a stimulus depends on the info contained in light reflected from that object to the eye. The electromagnetic spectrum is a continuum of electromagnetic energy that is produced by electric charges and is radiated as waves. The energy in this spectrum can be described by wavelength: the distance between two peals of the electromagnetic waves. The wavelength of visible light is associated with colors. (short =blue,green ; long = red,orange,yellow) light can be described as consisting of small packets of energy called photons.

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