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10.6.ch4

10.6.ch4 - Sensation and Perception How the World Enters...

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Unformatted text preview: Sensation and Perception: How the World Enters the Mind Ch. 4: Sensation and Perception • Sensation – The registration of properties of an object or event when a sensory receptor is stimulated • Perception – The act of organizing and interpreting sensory input Vision: Detecting Light – Wavelength: • Frequency of waves per second Range of Electromagnetic Radiation: Structures of the Eye • Controlling amount of light: – Pupil – Iris • Focusing light: – Cornea – Lens • Transduction of signals: – Retina • Fovea – Optic nerve • Filling in the blanks for the optic nerve – The “blind spot” Locating your blindspot: At close range, cover left eye and stare at +. Move closer to screen until the maroon circle inside the yellow circle to the right disappears Receptors in the eye • Rods (100-120 million) – Very sensitive to light – Only register shades of gray – Not in fovea • Cones (5-6 million) – Sensitive to particular wavelengths – Produce color vision – Denser near fovea Layers of Retina Getting the most out of your...
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10.6.ch4 - Sensation and Perception How the World Enters...

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