Waves

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Color of Light (Cont.)

Color of Objects

White light is the presence of ALL the colors of the visible spectrum.

Black objects absorb ALL the colors and no light is reflected back.

© 2000 Microsoft Clip Gallery

Slide 22

Color of Light (Cont.)

Primary Colors of Light

Three colors that can be mixed to

produce any other colored light

Red + blue + green = white light

Complimentary Colors of Light

Two complimentary colors combine

to make white light-Magenta,Cyan,Yellow

© 2000 Microsoft Clip Gallery

Slide 23

How You See

Retina –

Lens refracts light to converge on the retina. Nerves transmit the image

Rods –

Nerve cells in the retina. Very sensitive to light & dark

Cones –

Nerve cells help to see light/color

© 2000 Microsoft Clip Gallery

Slide 24

Paint Pigments

Pigments absorb the frequency of

light that you see

Primary pigments

Yellow + cyan + magenta = black

Primary pigments are compliments

of the primary colors of light.

© 2000 Microsoft Clip Gallery

Slide 25

Complementary Pigments

Green, blue, red

Complimentary pigments are primary colors for light!

© 2000 Microsoft Clip Gallery

© 2000 Microsoft Clip Gallery

Slide 26

Light & its uses

Sources of Light

Incandescent light – light produced by heating an object until it glows.

© 2000 Microsoft Clip Gallery

© 2000 Microsoft Clip Gallery

Slide 27

LIGHT & ITS USES

Fluorescent Light –

Light produced by electron bombardment of gas molecules

Phosphors absorb photons that are created when mercury gas gets zapped with electrons. The phosphors glow & produce light.

© 2000 Microsoft Clip Gallery

Slide 28

LIGHT & ITS USES - Neon

Neon light – neon inside glass tubes makes red light. Other gases make other colors.

© 2000 Microsoft Clip Gallery

Slide 29

LIGHT & ITS USES - Reflection

Reflection – Bouncing back of light waves

Regular reflection – mirrors smooth surfaces scatter light very little. Images are clear & exact.

Diffuse reflection – reflected light is scattered due to an irregular surface.