Seeing Color Examples
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Seeing Color Examples. 3. White objects appear white because they reflect all the colors of the visible spectrum. Primary Colors of Light.

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Seeing Color Examples

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Seeing color examples

Seeing Color Examples

3. White objects appear white because they reflect all the colors of the visible spectrum.


Seeing color examples

Primary Colors of Light

Even though the visible spectrum consists of seven different colors, all of the color seen by the human eye is a mixture of the three primary colors: red, green, and blue.


Seeing color examples

Primary Colors of Light

Red, green, and blue are the primary additive colors. When mixed together in different proportions, you can make just about any color. When mixed in equal proportions (added together), the three primary colors yield white light.

http://www.micro.magnet.fsu.edu/primer/java/scienceopticsu/light/additive.html


Seeing color examples

Primary Colors of Light

A pigment is a colored material that absorbs some colors and reflects others. The primary pigments are:

1. magenta

2. yellow

3. cyan


Seeing color examples

Primary Colors of Light

Cyan, Magenta, and Yellow are the primary subtractive colors. These colors are combined to produce print media and photographic film. When the subtractive primary colors magenta, cyan, and yellow are added together, they form the color black.

http://www.micro.magnet.fsu.edu/primer/java/scienceopticsu/light/subtractive.html


Seeing color examples

HOW THE HUMAN EYE

SEES COLOR

Color blindness occurs because one or more sets of cones do not function correctly.

Try these tests.

http://colorvisiontesting.com/ishihara.htm#plate with 10


Seeing color examples

Eye correctly focusing on the retina


Seeing color examples

Nearsightedness

  • Eyeball is too long or the cornea

    bulges

  • Image is focuses before it reaches

    the retina

  • Corrected with concave lenses


Nearsightedness

Nearsightedness

Incorrect Focal point

Correct Focal point


Seeing color examples

Farsightedness

  • Eyeball is too short

  • Image is focuses behind the retina

  • Corrected with convex lenses


Farsightedness

Farsightedness

focused incorrectly

focused correctly


Farsightedness1

Farsightedness


Farsightedness2

Farsightedness


Prisms rainbows

Prisms & Rainbows

  • Prisms: Separates white light into its component colors. The longer the wavelength, the less it will be bent by the prism.

  • Rainbows- light shining thru tiny droplets of water, each droplet acts as a prism


Interactions of waves

Interactions of Waves

  • Refraction – The bending of a wave due to the wave moving from one type of medium into another. 1. As light rays enter a new

  • medium the cause light to bend

  • 2. The denser the medium –

  • the slower the light travels


Interactions of waves1

Interactions of Waves

Reflection – Bounce back wave

  • –Angle of Incidence is the angle of the wave coming into the object reflecting the wave.

  • –Angle of Reflection is the angle bouncing off and going away from the object


Interactions of waves2

Interactions of Waves

•Diffraction – Wave passing a barrier or going through a hole in a barrier bends and causes the wave to wrap around the


Seeing color examples

Astigmatism

  • Surface of the cornea is curved

    unevenly

  • Image is not focused in the right place

  • Corrected with a combination of

    lenses


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