About Color & Light Presentation @Micheal Abebe

1. by Micheal Abebe

2. Light
Group 4 Assignment

3.  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 sun
 We 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.

4.  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.

5. 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 energy
Artificial light
 is light that is made by people, or man-made.
Eg-candles, kerosene lamps, flashlights, and light bulbs

6. Transparent
* An 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.

7. Translucent
An object that lets some light pass through it is
called translucent.
These objects are translucent: waxed paper,
sunglasses, frosted glass, and thin fabrics

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

9. Shadows 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

10. Reflect is when light or an image
bounces back off an object’s 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.

11. Lightning
Light travels faster than sound.
That is why the lightning is seen before the thunder is heard.

12. A 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.

13. When 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.

14. Color

15. CCoolloorr

17. red
green
blue

18. 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.

19. Color

20. 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 .

21. 1. Subtractive Theory
• The subtractive, or
pigment theory deals
with how white light is
absorbed and reflected
off of colored surfaces.
2. Additive Theory
• The Additive, or light
theory deals with
radiated and filtered
light.

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

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

25. Color Schemes/Arrangement
Systematic ways of selecting colors
*Monochromatic
*Complimentary
*Analogous
*Warm
*Cool
*Achromatic
*Chromatic Grays

27. Transparent Translucent

28. *Emission
*Reflection
*Transmission
*Interference
*Dispersion
*Scattering

29. Emission

30. Reflection:

31. Transmission
transmitted
through

32. Scattering

33. Interference

34. Dispersion

37. by Micheal Abebe