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PRODID:UW-Madison-Physics-Events
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UID:UW-Physics-Event-1408
DTSTART:20090213T220000Z
DURATION:PT1H0M0S
DTSTAMP:20260420T041533Z
LAST-MODIFIED:20090210T184751Z
LOCATION:2241 Chamberlin Hall (coffee and cookies at 3:30 pm)
SUMMARY:Gravity on the Test Bench: Torsion Balance Renaissance\, Physi
 cs Department Colloquium\, Jens Gundlach\, University of Washington
DESCRIPTION:In the last two decades torsion balances have been reintro
 duced to modern physics.  We have built highly refined torsion balance
 s to search for subtle deviations from ordinary weak-field gravity\; i
 n particular\, we have tested the equivalence principle to unprecedent
 ed precision\, including a test searching for non-gravitational accele
 rations towards dark matter. We have built special torsion balances to
  test the 1/r2-law of gravity for distance scales as small a few tens 
 of micrometers. Furthermore we have measured Newton's constant with un
 matched precision and have tested F=ma. We are also using our ultra-se
 nsitive torsion balance instruments to look for stray forces that may 
 affect the gravity wave observatories LIGO and LISA. <br>
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URL:https://www.physics.wisc.edu/events/?id=1408
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