PHYS 1010 Lecture Notes - Lecture 4: Absolute Threshold, Color Vision, Primary Color
Document Summary
The process of converting external stimuli into neural activity. Lighting a lighter in a room full of light. Smallest difference is detectable 50% of the time. Receptors become less responsive to constant/ unchanging stimuli. They stop firing because it"s the same. Eyes can transduce wavelengths between 400 and 700 nm (visual light spectrum) The cornea funnels light toward the pupil, works in conjunction with the pupil. As we get older, the lens becomes less flexible so it can"t bend enough. Rods and cones are where the magic happens (they are translucent) The axons of ganglion cells get out. One cone for each primary color of light. Frequency is the number of waves/ sec (hz) A hearing aid amplifies the sound waves. The ear is more complicated than the eyes. Perception: defining perception, how sensations are actively organized and interpreted by the brain, perception and higher cognition, change blindness: higher cognitive functions can make us unaware of sensory changes i.
