1. BEHAVIOR OF LIGHT
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2. When light strikes an object it is…
Reflected
Transmitted
Absorbed

3. REFLECTION
Light waves bounce off of a surface

4. TRANSMISSION
Light waves travel THROUGH an object.

5. ABSORBTION
Light waves do NOT bounce off or pass through an object.

6. Transparent-A material through which you can see CLEARLY.
How light behaves when it strikes on object depends on many factors, including what the material is made of.
Transparent-A material through which you can see CLEARLY.
Most of the light that
strikes a transparent object
PASSES THROUGH

7. Translucent-A material that scatters light and causes objects to appear fuzzy.
These materials allow light to pass through but they also scatter the light.

8. Opaque-A material that either absorbs or reflects all light that strikes it.

10. REFLECTION When light waves bounce off of a surface
IMAGE- A copy of an object formed by reflected waves of light.

11. REFLECTION Rough surfaces reflect light in ALL directions.
Smooth surfaces reflect light in ONE direction.

13. Law of Reflection Angle of incidence = Angle of reflection

14. VIRTUAL IMAGE
The image that appears to be
“ IN THE MIRROR” .

15. Virtual Image
The virtual image appears to be as far behind the mirror as you are in front of the mirror.

17. REFRACTION
Light waves BEND as they pass from one MEDIUM to another at an ANGLE.

18. Refraction
Makes objects appear LARGER & CLOSER than they really are.

19. Refraction
Makes objects appear to BREAK at the surface of the water.

20. PRISMS
Bend WHITE light and separate it into the VISIBLE LIGHT SPECTRUM.
Longer waves are refracted LESS than shorter waves.

23. POLARIZATION
Unpolarized light VIBRATES in all DIRECTIONS.

24. Polarization
A VERTICAL polarizing filter stops waves that are vibrating on a horizontal plane.
A HORIZONTAL polarizing filter stops waves that are vibrating on a vertical plane.

26. SCATTERING
Light is redirected as it passes through a MEDIUM

27. COLOR

28. The color of an object depends on 2 things
1. What the object is made of
2. The color of light that strikes the object

29. Primary Colors of Light
RED
GREEN
BLUE

30. Mixing Primary Colors Red + Green Red + Blue Green + Blue All 3
Yellow Magenta Cyan White

31. Primary colors combine to produce WHITE light

32. Complementary Colors
Two colors that combine to form white light.

33. Subtractive Colors-Pigments
A material that ABSORBS some colors and REFLECTS other colors.

34. Primary Colors of Pigments
CYAN
MAGENTA
YELLOW

35. Combining of primary pigments

37. How does it work?
The color of an object is determined by the colors of light it absorbs and the colors of light it reflects.
When white light falls on a red object, the object appears red because its surface subtracts (absorbs) all colors of light except red.
The light that is absorbed (subtracted) is transformed into heat. This explains why a black object, which absorbs all of the colors of light hitting it, gets much hotter in sunlight than a white object that reflects all colors

41. Additive vs. Subtractive Color