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The light enters the raindrop along the white rod and reflects once before refracting at 40 deg for violet and 42 deg for red.

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PHYSICS
6A46.26 Rainbow Sticks Rating:

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Description: Rainbow sticks are used as a model to show sunlight reflects and then refracts to make the colors and shape of the rainbow.
Room:PS F175 Location: Fb2 Sublocation:
Type: demo Date Added:6/10/2004 Condition:
Quantity:1 Complete: Last updated: 6/10/2004
Purpose: To explain how reflection and refraction of light make up the colors and the shape of the rainbow.
Safety Issues: Disclaimer (Warning - work in progress - may be incomplete)
Equipment Issues:
Parts:
blue ball with three holes (red, white & violet)
red rod
violet rod
white rod
Rainbow Sticks Tutorial CD (Hewitt)
Copyright © 2000 Instructions:
Watch the ten minute tutorial CD to see Paul Hewitt teach this lesson.
Screw the colored rods into the color coded holes.
Show that light enters the rain drop and reflects once before it refracts 40 deg for violet and 42 deg for red.
Look along the colored rod and point out that the light (represent by the white rod) actually comes from behind you.
With the white rod pointing where the sun is presumed to be have the rainbow sticks swing an arc for the characteristic rainbow shape.
Point out that no two people see the same rainbow.
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1A30.10B XYZ Coordinate axes Zometool version
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1A30.10C XYZ Coordinate axes Medium arrow shafts with dull broadheads
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1A30.30 Polar Coordinates A semi circle is rotated about an axis to demonstrate why integration over theta is from zero to 180 degrees.
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1A30.30 Polar Coordinates
1A30.40A Chalkboard Globe - Large
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1A30.40B Chalkboard Globe - Small
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1A40 Vectors
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