Any of a number of optical, acoustic, or radio-frequency tools that use interference phenomena between a reference revolution and an experimental trend or between two components of an experimental trend to determine wavelengths and revolution velocities, measure really small distances and thicknesses, and calculate indices of refraction.
any one of a few instruments that use the interference of waves to find out wavelengths and trend velocities, determine refractive indices measure small distances, temperature changes, stresses, and lots of various other of good use dimensions
a musical instrument for calculating little movements, distances, or displacements in the shape of the disturbance of two beams of light; -- previously also known as in addition refractometer, but that term now features another type of meaning.
a musical instrument for the measurement of lengths in the shape of the phenomena resulting from the interference of two rays of light.
any measuring instrument that uses interference patterns to help make precise dimensions of waves