PSYCH 1X03 Lecture Notes - Amacrine Cell, Visual Acuity, Retinal Pigment Epithelium
11 Feb 2013
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Document Summary
Light moves at about 300 000 km/sec. The height of each wave is the amplitude. The distance between waves of the successive waves is the wave length. Variations in amplitude affect the perception of brightness, the higher the brighter. Variations in wavelength affect the perception of colour. Smaller wavelengths refer to a light wave with a higher frequency because there is less distance between successive peaks. Larger wavelengths refer to light waves with a lower frequency. Humans are only sensitive to a tiny portion of the total range of wavelengths of electromagnetic radiation, this tiny portion is called the visible spectrum. The shortest wavelength that we can see is around 360 nanometers (violet) and the longest is 750 nanometers (red) Bees can see shorter than 360 in the ultraviolet spectrum and may see flowers that look all the same to us to be perceived the same to them.
