This pendant depicts the Michelson interferometer, one of the most important tools of science. In addition showing the interferometer, this necklace also demonstrates its function by allowing one of the mirrors to be moved, thereby changing the degree of interference between the wavelengths entering the detector. In addition to their scientific value, interferometers are also important components in many of the technological devices which enhance our everyday lives. Cast in pewter Comes with an adjustable length 2mm black leather necklace cord. Dimensions: 3.1 cm wide x 3cm high (not including loop) x 0.5cm thick Weight: 13.5g