interferometer
/ˌɪntərfɪˈrɒmɪtər/
Definition
A precision scientific instrument that measures properties of light waves by splitting a beam into two paths and observing the resulting interference patterns.
Etymology
Derived from the Latin 'interferre' (to carry between) combined with the Greek 'metron' (measure). The term emerged in the late 19th century to describe devices that use the phenomenon of wave interference to perform measurements.
In the news
The article references the Michelson-Morley interferometer, which was used in 1887 to search for the luminiferous ether. By failing to detect light wave interference, it disproved the existence of the ether and paved the way for Einstein's theory of relativity.
Space science has come a long way since July 4, 1776. Here's a look back at the saga
Read the full article ↗Space