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Uploaded by cameraculturegroup on Aug 19, 2010
Hint: I shot it in front of MIT Biology bldg.
Science & Technology
Standard YouTube License
retroreflector
tubescientis 1 year ago
easy, it's a corner mirror, it's used by lazer distance measurement tools, so that a lazer beam will always reflect back to where it came from.
ollly666 1 year ago
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retroreflector
tubescientis 1 year ago
easy, it's a corner mirror, it's used by lazer distance measurement tools, so that a lazer beam will always reflect back to where it came from.
ollly666 1 year ago