A simple pendulum laser interferometer for determining the gravitational constant

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DOIResolve DOI: http://doi.org/10.1098/rsta.2014.0024
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TypeArticle
Journal titlePhilosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
ISSN1364-503X
Volume372
Issue2026
Article number20140024
SubjectFabry-Perot; Gravitational constant; Laser interferometer; Physical constants; Precision measurement; Simple pendulums
AbstractWe present a detailed account of our 2004 experiment to measure the Newtonian constant of gravitation with a suspended laser interferometer. The apparatus consists of two simple pendulums hanging from a common support. Each pendulum has a length of 72 cm and their separation is 34 cm. A mirror is embedded in each pendulum bob, which then in combination form a Fabry-Perot cavity. A laser locked to the cavity measures the change in pendulum separation as the gravitational field is modulated due to the displacement of four 120 kg tungsten masses.
Publication date
PublisherRoyal Society Publishing
LanguageEnglish
AffiliationNational Research Council Canada; Measurement Science and Standards
Peer reviewedYes
NPARC number21272625
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Record identifiere1dc56ef-6a55-4f5d-b757-00c7e3f2c457
Record created2014-12-03
Record modified2016-05-09
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