HUMAN VISION The Eye Light WAVE PARTICLE Physics

HUMAN VISION

The Eye

Light WAVE PARTICLE

Physics of the Eye’s lens

Parallax Lab • Although each eye alone gives focus, together, they provide you with depth perception. How?

Parallax

Light WAVE PARTICLE

Rods and Cones

Color Spectrum and Photopsin Different opsins differ in a few amino acids and absorb light at different wavelengths as retinal-bound pigments. Cone type Name Range Peak wavelength[1][2] S (OPN 1 SW) - "tritan", "cyanolabe" β 400– 500 nm 420– 440 nm M (OPN 1 MW) - "deutan", "chlorolabe" γ 450– 630 nm 534– 545 nm L (OPN 1 LW) - "protan", "erythrolabe" ρ 500– 700 nm 564– 580 nm

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.

Primary Colors of Light and Pigment

Colorblindness Normal protanopia deuteranopia tritanopia All three cone types Absence of red receptor Absence of green receptor Absence of blue receptor

Humans vs. Animals Honeybees, bumblebees, and many butterflies

Illusions Lab (Discussion) • Why do you think we experience the following as optical illusions?

optical illusions • http: //www. michaelbach. de/ot/ang_fraser/in dex. html