The echelon version consists of a stack of glass plates, while the Fabry-Perot type uses a pair of half-silvered mirrors to produce circular fringes.
This device was first developed to measure the wavelength of light, and is used today to measure the diameter of nearby stars, test flat surfaces, determine the indices of refraction of materials, and measure small distances. The echelon version consists of a stack of glass plates, while the Fabry-Perot type uses a pair of half-silvered mirrors to produce circular fringes. FTP, name this device most famously used by Michelson and Morley to disprove the existence of ether?
This device was first developed to measure the wavelength of light, and is used today to measure the diameter of nearby stars, test flat surfaces, determine the indices of refraction of materials, and measure small distances.
Interferometer