Color & Light

Light & ColorAddis Collegeby Micheal AbebeBasic Design-

LightGroup 4 AssignmentBasic Design-

What is Light?Light is radiant energy, usually referring to electromagnetic radiation that is visible to the human eye, and is responsible for the sense of sight.light is energy in the form of electromagnetic radiation, whose origin is our sunWe see things every day, from the moment we get up in the morning until we go to sleep at night. We look at everything around us using light. Without light, you wouldn't see anything at all.

What is Light?Light travels VERY FAST around 300,000 kilometres per second. At this speed it can go around the world 7.5 times in one second.Light travels much faster than sound

Light travels very fast and in straight lines.

types of light ?There are two types of light: natural light or artificial light.

Natural light The most important source of natural light is the sun.The sun gives the earth light and energyArtificial light is light that is made by people, or man-made. Eg-candles, kerosene lamps, flashlights, and light bulbs

Properties of LightTransparentAn object that lets all light pass through it is called transparent.These objects are transparent: clear glass, eyeglasses, window, fish tank, clear plastics, and transparent tape.

Properties of LightTranslucentAn object that lets some light pass through it is called translucent.These objects are translucent: waxed paper, sunglasses, frosted glass, and thin fabrics

Properties of LightOpaquenot able to be seen through; not transparent. These objects are opaque: rock, metal, wood, fog, aluminum foil, thick paper, and brick.

Properties of LightShadows are caused by opaque objects blocking the path of light.Long shadows are seen in early morning and late afternoon.Shorter shadows are seen at noon.

Shadow

Properties of LightReflect is when light or an image bounces back off an objects surface.Light can bounce back off an opaque object. An image can bounce back off an object, such as, a mirror, pond or lake, or shiny metal.

Properties of LightLightningLight travels faster than sound.That is why the lightning is seen before the thunder is heard.

RainbowA rainbow appears in the sky when the sun shines through droplets of water in the air, creating a spectrum of color.The white light is broken up into many colors.

Spectrum of ColorWhen you look at a light, it appears to be white.Light is made up of many colors. These colors can be seen when light is broken up.There are seven colors of light in a spectrum: red, orange, yellow, green, blue, purple, and violet.These colors are always seen in the same order.

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Next up_Color

ColorColor

What is Color?

The only thing we can see is lightWhen the light bounce on object we can understand the Color &Texture .The colour an object appears depends on the colours of light it reflects.

Rods and Cones in the Retina:

*the cones are red, green, and blue.*some animals, perception of color is a complex neurophysiologicalThe science of color is sometimes called chromatics, colorimetry, or simply color science.

red green blue

Colors

Color is the perceptual quality of light.The human eye can distinguish almost ten million colors. 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.

-Color +Color

The colours of the rainbow:RedOrangeYellowGreenBlueIndigoViolet

Color derives from the spectrum/appearance/of light (distribution of light power versus wavelength ) interacting in the eye with the spectral sensitivities of the light receptors .

Types of Color Theories

Subtractive TheoryThe subtractive, or pigment theory deals with how white light is absorbed and reflected off of colored surfaces.Additive TheoryThe Additive, or light theory deals with radiated and filtered light.

Subtractive Theory

Black absorbs most lightWhite reflects most lightThe primary colors in Subtractive Theory are:Cyan( C )Magenta( M )Yellow( Y )Black( K )Subtractive or Pigment Theory is used in printing and painting.

Additive Theory

Black radiates no lightWhite (sun) radiates all light.The primary colors in Additive Theory are:Red( R )Green ( G )Blue( B )The primary colors add together to make whiteLight Theory is also called Additive Theory.Light Theory is used in Television, theater lighting, computer monitors, and video production.

The Visible Spectrum

Color Schemes/Arrangement Systematic ways of selecting colors

MonochromaticComplimentaryAnalogousWarm CoolAchromaticChromatic Grays

Color for Categories and Sequences

Types of MaterialsTransparentTranslucent

Color comes to our eyes from objects due to:EmissionReflectionTransmissionInterferenceDispersionScattering

Emission:the object itself is a source of light.

Reflection: certain frequencies are reflected from the object, others are absorbed.

Transmission certain frequencies are transmitted through the object, others are absorbed.

Scattering

the radiation of certain frequencies of light, striking small, suspended particles.

Interference: constructive and destructive interference.

Dispersion

the angular separation of a light wave during refraction.

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The end sep-6-2014by Micheal Abebe