1. PROPERTIES
Of LIGHT
Created By: Courtney Taylor

2. PROPERTIES Of LIGHT
What are the basic properties of light?
BRIGHTNESS
COLOR
VISIBILITY

3. BRIGHTNESS
The brightness of light is related to the amount of light being seen.
Brightness - the intensity of light.

4. BRIGHTNESS
The greater the distance the source of the light is, the lesser the intensity or brightness.

5. COLORS
Light (or white light) is made up of ALL colors of light mixed together.
So, white light is a mixture of all the colors of the rainbow!

6. COLORS
If white light is passed through a prism, it can be separated into light of different colors.
The colors are red, orange, yellow, green, blue, indigo, and violet.

7. COLORS
If white light is passed through a prism, it can be separated into light of different colors.
The colors are red, orange, yellow, green, blue, indigo, and violet.

8. VISIBILITY
In order for an object to be visible, it must either give off its own light (be a source of light) or it must reflect light.

9. VISIBILITY Examples of objects that gives off their own light: the sun
candle flame
flashlight

10. VISIBILITY
The Moon and many objects around us reflect light in order to be seen.

11. What is LIGHT?
Light is a form of energy and is made of many colors.

12. What is LIGHT? Our primary source of light is the sun.
Light energy from the sun travels through space , reaches earth, and some of it turns to heat energy and warms the earth’s air.

13. What is LIGHT? Our primary source of light is the sun.
Light energy from the sun travels through space , reaches earth, and some of it turns to heat energy and warms the earth’s air.

14. What is LIGHT? What are some examples of light energy? Sun Bonfire
Street lamp

15. What is ENERGY?
Energy is the ability to make something move, happen, or change.

16. What is ENERGY? So…how is light a form of energy?
Light moves in the form of “waves.”
Light waves travel until they hit an object and bounce off, so that we can see the object. Light waves move too fast for us to see them. Light travels through air, space and clear materials like glass and water.

17. COLORS
The different colors of light are revealed when white light is passed through a prism and separated into the different colors of the rainbow, called the spectrum.

18. COLORS
The different colors of light are revealed when white light is passed through a prism and separated into the different colors of the rainbow, called the spectrum.
ROY G BIV

19. COLORS
These colors are related to the different amounts of energy in white light.
Each color represents a different amount of energy.

20. HOW DOES LIGHT TRAVEL?

21. How does LIGHT travel?
Light travels in a straight line away from the light source.
LASER

22. How does LIGHT travel? Light travels VERY fast!
Around 186,000 miles per second!
At this speed, it can go around the world about 8 times in one second!

23. REFLECTION
When light is reflected, it bounces back from a surface.

24. REFLECTION
Reflection allows objects to be seen that do not produce their own light.

25. REFLECTION
When light strikes an object, some of the light reflects off of it and can be detected by our eyes.
When light strikes a smooth, shiny object it is reflected so that a reflection can be seen that looks very similar to the object seen with light reflected directly from it.

26. Only red light is reflected
REFLECTION
The color an object appears depends on the color of light it reflects.
For example, a red book only reflects red light:
Only red light is reflected
White
Light

27. REFRACTION
When light is refracted it passes from one type of transparent material to another, and changes direction.

28. REFRACTION
When light is refracted, the light wave is bent.

29. REFRACTION
When light travels through a magnifying glass, the light changes direction and we see a larger, magnified view of the object.

30. REFRACTION Why does my straw look broken?
When a straw is viewed in water, light passes from the water to the air causing the path of light to bend. When the light bends, the straw appears distorted (bent or broken).

31. ABSORPTION
When light is absorbed it does not pass through or reflect from a material.
It remains in the material as another form of energy.

32. ABSORPTION
The colors of objects are determined by the light that is not absorbed but is reflected by the objects.
This red apple reflects red colors of light and absorbs all other colors!

33. HOW DOES LIGHT BEHAVE WHEN IT STRIKES MATERIALS?

34. How does LIGHT travel?
light
source
Light rays travel in straight lines from the light source.
When it hits an opaque object, some light is absorbed and the rest reflects off.

35. How does LIGHT travel?
light
source
Light rays travel in straight lines from the light source.
If the object is translucent, some light can pass through, but the rest of the light will be reflected.

36. How does LIGHT travel?
light
source
Light rays travel in straight lines from the light source.
If the object is transparent, light rays pass through it easily.

37. when it strikes materials?
How does LIGHT behave
when it strikes materials?
Light behaves differently when it strikes different types of materials.

38. when it strikes materials?
How does LIGHT behave
when it strikes materials?
Transparent, translucent, and opaque are categories that describe how light travels through an object.
Some objects allow light to pass through and some do not.

39. TRANSPARENT
A transparent material allows light to pass through it because it is not absorbed or reflected.
Objects can be seen clearly when viewed through transparent materials.

40. We can see clearly through the object.
TRANSPARENT
We can see clearly through the object.

41. TRANSPARENT
Examples:
Air
Glass
Water

42. TRANSLUCENT
A translucent material scatters or absorbs some of the light that strikes it and allows some of the light to pass through it.
Objects appear as blurry shapes when viewed through translucent materials.

43. TRANSLUCENT
You cannot clearly see through the object, but you can see some light or shadows.

44. TRANSLUCENT
EXAMPLES
Waxed Paper
Frosted Glass

45. OPAQUE
An opaque material does not allow light to pass through, light is either reflected from or absorbed by an opaque material.

46. OPAQUE
You cannot see through the object.

47. OPAQUE
Examples:
Wood
Metals
Thick Paper
Ceramic Mug