LABORATORY ACTIVITY 2
COLORED SHADOWS (Not all Shadows are Black)
I. MATERIALS
whiteboard
three flashlights with the same light intensities
three colored water cellophanes (red, blue and green)
any solid object
camera
II. DIAGRAMS/PICTURES
whiteboard
three flashlights with the same light intensities
three colored water cellophanes (red, blue and green)
any solid object
camera
II. DIAGRAMS/PICTURES
III. RESULTS
As the three RGB lights were positioned in different angles and combined in one spot in the whiteboard, it would appear white. Colored shadows could be seen as well such as Red, Green, Blue, Yellow, Cyan and Magenta. When red light was blocked leaving the mixture of blue and green, cyan would be produced. When green light was blocked leaving the mixture of red and blue, magenta would be produced. When blue light was blocked leaving the mixture of red and green, yellow would be produced. It would appear black when all three lights were blocked.
IV. DISCUSSION
Our eyes can perceive various shades of color through the retina of our eyes. It has three receptors for colored lights to wit; for red, green and blue. These three primary colors of light can produce different mixtures of colors such as Yellow, Magenta and Cyan. When two different-colored lights shine on the whiteboard, the light reflecting from that spot to our eyes is the additive mixture because it contains the colors from both lights. This explains when a light is blocked leaving the two other colors combine.
V. CONCLUSION
I conclude that not all shadows are black. Some shadows can be red, green, blue, and other additive mixtures that can be produced by two other colors of light. Through our retinas, we can perceive colors; different colors and not only black.
VI. SOURCES
i-Physics IV Color & Light
Exploratorium (www.exploratorium.edu)
As the three RGB lights were positioned in different angles and combined in one spot in the whiteboard, it would appear white. Colored shadows could be seen as well such as Red, Green, Blue, Yellow, Cyan and Magenta. When red light was blocked leaving the mixture of blue and green, cyan would be produced. When green light was blocked leaving the mixture of red and blue, magenta would be produced. When blue light was blocked leaving the mixture of red and green, yellow would be produced. It would appear black when all three lights were blocked.
IV. DISCUSSION
Our eyes can perceive various shades of color through the retina of our eyes. It has three receptors for colored lights to wit; for red, green and blue. These three primary colors of light can produce different mixtures of colors such as Yellow, Magenta and Cyan. When two different-colored lights shine on the whiteboard, the light reflecting from that spot to our eyes is the additive mixture because it contains the colors from both lights. This explains when a light is blocked leaving the two other colors combine.
V. CONCLUSION
I conclude that not all shadows are black. Some shadows can be red, green, blue, and other additive mixtures that can be produced by two other colors of light. Through our retinas, we can perceive colors; different colors and not only black.
VI. SOURCES
i-Physics IV Color & Light
Exploratorium (www.exploratorium.edu)