human vision. the eye light wave particle physics of the eye’s lens
TRANSCRIPT
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HUMAN VISION
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The Eye
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Light
WAVE
PARTICLE
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Physics of the Eye’s lens
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Parallax Lab
• Although each eye alone gives focus, together, they provide you with depth perception.
How?
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Parallax
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Light
WAVE
PARTICLE
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Rods and Cones
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Color Spectrum and Photopsin
Cone type Name Range Peak wavelength[1][2]
S (OPN1SW) - "tritan", "cyanolabe" β 400–500 nm 420–440 nm
M (OPN1MW) - "deutan", "chlorolabe" γ 450–630 nm 534–545 nm
L (OPN1LW) - "protan", "erythrolabe" ρ 500–700 nm 564–580 nm
Different opsins differ in a few amino acids and absorb light at different wavelengths as retinal-bound pigments.
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Primary Colors Lab
The definition of a “primary color” is that no combination of other colors can be used to make it.
Why is this a bad definition?Given markers and top materials,
experimentally verify all types of primary colors and explain how your results reflect the known properties of photopsin.
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Primary Colors of Light and Pigment
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Colorblindness
Normal protanopia deuteranopia tritanopia
All three cone types Absence of red receptor
Absence of green receptor
Absence of blue receptor
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Humans vs. Animals
Honeybees, bumblebees, and many butterflies
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Illusions Lab (Discussion)• Why do you think we
experience the following as optical illusions?
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optical illusions
• http://www.michaelbach.de/ot/• http://www.michaelbach.de/ot/ang_fraser/in
dex.html