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Waves, Light & Sound. Light & Color Recap , Wrap-Up & movin ’ on. How do we see?. Light passes through the cornea Through the aqueous humor Through the pupil Through the lens Through the vitreous humor And then is detected by the rods & cones of the retina.

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waves light sound

Waves, Light & Sound

Light & Color

Recap, Wrap-Up & movin’ on

how do we see
How do we see?
  • Light passes
    • through the cornea
    • Through the aqueous humor
    • Through the pupil
    • Through the lens
    • Through the vitreous humor
  • And then is detected by the rods & cones of the retina
how light is focused depends on
How light is focused depends on…
  • the shape of the
    • cornea
    • lens (which changes)
    • eyeball
light images are
Light images are
  • Upside down on the retina
  • Transmitted to the brain by the optic nerve
  • Flipped by the brain so we see them right side up
if images aren t focused correctly
If images aren’t focused correctly…
  • Vision problems occur
    • Myopia (nearsighted)
      • Only see things close to you
    • Hyperopia(farsighted)
      • Only see things far away from you
    • Presbyopia
      • Farsightedness in old people
    • Astigmatism
      • Blurred vision
colors
Colors
  • White is ALL colors of light reflected back at you
  • Black is all colors of light absorbed and NONE reflected back at you
  • When an object has color, you see that color reflected the most
    • Eg: a red apple appears red because only red light is reflected back at you
colors that cones can sense
Colors that Cones can sense:
  • Red
  • Blue
  • Green

(Are you SEEING a pattern here?)

primary colors of pigments
Primary Colors of Pigments
  • Dyes added to make colors
    • Cyan (blue)
    • Magenta (pink)
    • Yellow