2. COLOR DEMO LAB Waves, Sound, Light & Color Unit

3. 1. Visible light is the small part of the Electromagnetic Spectrum that humans can see. 2. The wavelengths of visible light are 400 nm to 700 nm

4. Electromagnetic Spectrum radio microwave UV Gamma Rays radar infrared x- rays F A

5. 3. Color depends on the wavelength of the visible light wave.

6. The wavelengths of 4 colors in the rainbow

7. ROY G. BIV 4. The colors of light that we see are a result of the receptors in the eye that detect color.

8. 5. The primary colors of light are red, blue, and green. ROY G BIV

9. 6. When all three primary colors are combined, white light is produced. Colors of light are additive. Click on this hyperlinked address to access a terrific interactive website doing the above or use a set of flashlights. http://micro.magnet.fsu.edu/primer/java/primarycolors/addit iveprimaries/index.html

10. The outside 3 together to make the “white in the middle” The three outer colors are the colors of light which pair up to form the interior shades shown. The outside 3 together to make the “white in the middle”

11. 7. The secondary colors of light are magenta, cyan and yellow. These colors are used in color print ads.

12. red + blue = ________ red + green = _______ blue + green = _______

13. 8. Objects appear to be certain colors because of the waves they reflect. 9. Chemicals in the object, called pigments, absorb and reflect colors of light.

15. 10. The primary pigments are magenta, cyan, and yellow. Pigments are subtractive 11. When 2 primary pigments are combined we see secondary pigments: red, green, and blue.

16. Just the yellow:

17. Just the yellow & magenta:

18. Nearly complete with yellow, magenta & cyan:

19. Now ready for mailing yellow, magenta & cyan plus some gray and black for shading.

20. Just the yellow:

21. Just the yellow & magenta:

22. Nearly complete with yellow, magenta & cyan:

23. Now ready for mailing yellow, magenta & cyan plus some gray and black for shading.

24. When you stare at the coming pictures, your eyes will do color subtraction……… you exhaust the ability to see some colors, all that’s left are the other colors….. Color Subtraction !

26. The human eye has cone cells for detecting red, blue, and green light. These cells are used for daylight vision. Rod cells are used in night vision since they detect only light and dark.

27. Stare at the center of the circle in the next slide.

30. Cyan red cyan Cyan is composed of blue and green. After staring at cyan for a long time, you have exhausted the blue and green cone cells in your eye. Therefore, when you look at white, you see red after staring at cyan.

31. When have you ever experienced this phenomenon?

32. When someone takes your picture using a flashbulb, you see black spots. The flashbulb exhausted all of the cone cells in your eye so none of them were working for a few moments, and you don’t see any light.

33. Stare at the center of the circle in the next slide.

36. Yellow yellow yellow Yellow is composed of red and green. After staring at yellow for a long time, you have exhausted the red and green cone cells in your eyes. Therefore, you see blue after staring at yellow.

37. Stare at the center of the circle in the next slide.

40. Magenta is composed of red and blue. After staring at magenta for a long time, you have exhausted the red and blue cone cells. Therefore, you see green after staring at magenta.

41. Your eyes are capable of more complicated shapes than circles. Stare at the center of the heart on the next slide.

44. cyan cyan You should have seen a red heart after staring at the cyan heart since you have exhausted the green and blue cone cells from staring at cyan.

45. Stare at the center of the next slide.

48. You should have seen a green smiley face since your blue and red cone cells were exhausted from staring at the magenta smiley face.

49. Your eyes are capable of resolving an even more complicated picture. Stare at the center of the next slide.

55. cyanyellow The U.S. flag was originally cyan, yellow and black. white After it was removed it appeared red, white, and blue.

56. NO ALL WHITE If NO color reaches your eyes, since it is absorbed, you see BLACK. If ALL color reflects and reaches your eyes you see WHITE.

57. Stare at the center of the even more complicated picture.

60. 16. What process that produces light traveling in only one plane? 17. What types of products have such filters? Click on this hyperlinked address to go to a great interactive website on polarization of light. http://micro.magnet.fsu.edu/primer/java/polarizedlight/filters/index.html

61. 18. The bending of a sound wave as it passes an edge or an opening is called __________. Can’t light do this too? Check out this cool website, and adjust the colors too. http://micro.magnet.fsu.edu/primer/java/diffraction/basicdiffraction/index.html

62. The remaining slides are NOT really in the curriculum for the Waves… Unit. If time allows, have fun doing the following to test yourself for colorblindness!

64. Color blindness usually involves the colors of red and green. Color blindness is found in 4% of the male population and 0.25% of the female population.

65. Color blindness is a sex linked recessive genetic trait that appears on the X chromosome. Since men have only one X chromosome, if the gene for color blindness appears on it, they will be color blind. Women have two X chromosomes and it would have to appear on both X chromosomes before the woman would exhibit the trait.

67. What do you see in the next slide?

69. Everyone should have seen the number 25.

70. What do you see in the next slide?

72. If you have normal vision you should see the number 29. If you are red-green color blind you will probably only see spots.

73. What do you see in the next slide?

75. If you have normal vision you should see the number 45. If you are red-green color blind you will probably only see spots.

76. What do you see in the next slide?

78. Everyone should see the number 56.

79. What do you see in the next slide?

81. If you have normal vision you should see the number 6. If you are red - green color blind you will probably only see spots.

82. What do you see in the next slide?

84. If you have normal vision you should see the number 8. If you are red - green color blind you will probably only see spots.

85. What NUMBER do you see in the next slide?

87. The individual with normal color vision will see a 5 revealed in the dot pattern. An individual with red - green (the most common) color blindness will see a 2 revealed in the dots.

88. The following Optical Illusions slides are also for your enjoyment and are NOT really in the Waves, Sound, Light and Color Unit.

90. Can you find the old woman and the young girl?

91. The old woman is facing the left and wearing a fur coat. The young woman is facing the back and wearing a necklace.

92. Can you find the rabbit and the duck?

93. The duck is facing the left and the rabbit is facing the right.

94. How many tines are there?

95. Notice what looks like a tine on the left turns into empty space on the right.

96. What makes up the front of the crate?

97. Notice how what is an inside piece on the bottom right turns into an outside piece on the bottom left.

98. Are the two lines equal in length?

99. YES they are the same length. They appear different lengths because of the arrow heads connected to them.

100. What do you see?

101. You should see the word LIAR written in cursive and a person’s face.

102. Stare at the red parrot for 20 seconds. Then look at the bird cage. You should be able to see the image of a cyan bird in the cage. Then stare at the green parrot for 20 seconds. Then look at the bird cage. You should now see a magenta bird in the cage.

103. What do you see?

104. There is an Eskimo turned away from you or an Indian facing left.

105. Each different picture represents the change of just one line and it transforms the face into a woman kneeling and facing the right side.

106. What do you see?

107. You should be able to see a woman’s face or a person playing a saxophone.

108. What do you see?

109. How many faces do you see?

110. There are three faces there. Two are facing each other and the third is facing forward.

111. How many legs does the elephant have?

112. Some of what appear to be feet at the bottom of the diagram turn into space at the top and what appears to be legs leaving the body turn into free space at the bottom.

113. What do you see in the picture?

114. You should be able to see a woman looking in a vanity mirror or a skull.

115. What do you see?

116. You should be able to see a vase or two people facing each other.

117. How many people can you see?

118. There are 9 people in the picture.

119. What color are the horsemen?

120. There are off white horsemen moving to the left and brown horsemen moving to the right.

121. The End.