Year: 1950
Type: article
Abstract: A modified form of Michelson interferometer is used to calibrate the mechanical displacement system of an adjustable cavity resonator. With this resonator the velocity of propagation of electromagnetic waves has been newly determined, as will be described elsewhere. For the calibration a linear displacement of 12.7 cm (5 in) was determined in standard krypton wavelengths to an accuracy of one part in a million, utilizing techniques of fringe observation and calculation which do not involve counting a progression of fringes. Displacements up to 30 cm and greater can be similarly measured if suitable sources of monochromatic radiations are employed.
Authors: H Barrell, M J Puttock
Institution: National Physical Laboratory
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W1995498573