Simulating Circular Polarization with a Christmas Tree Bead Strand

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SUMMARY

The forum discussion centers on the inadvertent simulation of circular polarization of light using a long strand of Christmas tree beads. The strand, consisting of four helically woven strands, created a buildup of circular torque as it was unraveled. This action resulted in a circular pulse traveling down the length of the strand, reminiscent of the behavior of polarized light. The user noted the analogy while preparing for an exam on circular polarization.

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DaveC426913
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Yesterday I was busy inadvertantly simulating circular polarization of light.

We were taking down the Christimas tree including a very long strand of beads. The strand was composed of 4 strands of beads (each like a pearl necklace) woven in a helix.

When we (my wife & I) started at one end to unravel the 4 strands from each other, the net result was build up up circular torque as we moved down the length of the strand (it was > 100 feet long). It built up like the knots that form in the elastic of a balsa airplane when you wind it up.

Each time I lifted the strand, the buildup of circular tension would release, and a circular pulse would race down the length of the strand for several dozen feet.

OK, probably not a perfect analogy for polarized light, but cool nonetheless.
 
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Hehe. Oh damn I got an exam which may include a small part on circular polarization in 10 hours time! Time for bed.
 

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