"The actual balance is enclosed in a metal case with glass windows to protect the torsion balance from air currents while allowing the laser beam to bounce from the mirror."
video: http://www.leydenscience.org/physics/gravitation/detail.mpg
source: http://www.leydenscience.org/physics/gravitation/cavend.htm
"The actual balance is enclosed in a metal case with glass windows to protect the torsion balance from air currents while allowing the laser beam to bounce from the mirror."
video: http://www.leydenscience.org/physics/gravitation/detail.mpg
source: http://www.leydenscience.org/physics/gravitation/cavend.htm
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