Fabry-Pérot interferometry is an optical technique that uses multiple beam interference to measure very small changes in light wavelengths. This method involves a pair of partially reflective mirrors that create a series of parallel light beams, allowing for precise measurements of the frequency of light, which is crucial in analyzing the Doppler effect and determining radial velocities in astronomical objects.
congrats on reading the definition of Fabry-Pérot interferometry. now let's actually learn it.