Of the several varieties of this device, the echelon consists of a stack of glass plates arranged stepwise with a constant offset and is used in spectroscopy to study hyperfine line structure. Another version is the Fabry- Pérot type, in which monochromatic light is passed through a pair of parallel half-silvered glass plates producing circular interference fringes. However, its most famous use can probably be attributed to the debunking of ether
Of the several varieties of this device, the echelon consists of a stack of glass plates arranged stepwise with a constant offset and is used in spectroscopy to study hyperfine line structure. Another version is the Fabry- Pérot type, in which monochromatic light is passed through a pair of parallel half-silvered glass plates producing circular interference fringes. However, its most famous use can probably be attributed to the debunking of ether in the 1887 Michelson-Morley experiment. FTP, identify this type of device used to measure wavelengths and distances by producing interference fringes.
Of the several varieties of this device, the echelon consists of a stack of glass plates arranged stepwise with a constant offset and is used in spectroscopy to study hyperfine line structure.
{interferometer}