Day 4_Part_2 - ■ light does not have color ◆ the...

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6 Structure of the Eye (cont) fovea very small region of the retina with the densest collection of cone cells (147,000 cones/mm) some hawks have 1,000,000 cells in the same area (can see a small animal at a distance where a human could not even see the hawk) visual field is centered on fovea rods start to appear at the edge of the fovea and increase rapidly in density away from fovea night vision is often better slightly away from the center of the visual field
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7 The Nature of Light light is an electromagnetic phenomenon (like radio waves, microwave, x-rays, etc) waves are characterized by wavelength (or frequency) usually measured in nanometers for light (10 -9 meters)
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8 Visible Spectrum visible spectrum approximately 400-700nm
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Unformatted text preview: ■ light does not have color ◆ the sensation of color is perceived ■ color perception starts with cone cells www.handprint.com/HP/WCL/color1.html 9 Tristimulus Theory ■ 3 different cone cells respond to certain regions of the visible spectrum 10 Tristimulus Theory (cont) ■ only have 3 (?) different types of cone cells ◆ this suggests that a properly blended combination of three different colors can reproduce any color light we perceive ◆ mantis shrimp has 10 different color receptors ■ a good choice of colors is red, green, and blue ■ if you take a red, green, and blue light can you match any color light? ◆ C = rR + gG + bB ?...
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This note was uploaded on 02/13/2012 for the course CSE 4431 taught by Professor Burton during the Winter '12 term at York University.

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Day 4_Part_2 - ■ light does not have color ◆ the...

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