by beating two waves of the same source but of different frequency and measuring the phase shift of the lower frequency obtained

Introduced: January 1980

Last revised: January 2006

Full Title

Measuring optical phase difference; Determining degree of coherence; Measuring optical wavelength > by beating two waves of the same source but of different frequency and measuring the phase shift of the lower frequency obtained

Classification Context

Section:: PHYSICS
Class:: MEASURING; TESTING
Subclass:: MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY