PIRA 6F40.10 Scattering Sunset
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demo master list.
Photo of the Demonstration at the University of Texas
at Austin.
Instructions / Notes:
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A light beam is projected from an overhead projector through a 4 liter beaker atop of a black piece of cardboard with a hole cut out of it.
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The beaker will contain water, and milk should be provided by the professor.
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Briefly stir milk in the beaker, turn on the lamp, and wait four or five minutes.
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A sulfate precipate begins to cloud the tank causing the first scattering
effect, which appears nearly sky-blue within the tank.
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The projected light seen on the opposite wall at this point changes from
white to yellow.
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The next phase, which occurs very briefly, two scattering colors are noticed
in the tank, while the light projected on the wall becomes orange.
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When the light projected on the wall appears to be red, the chemical reaction
is complete.
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