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Education in Optics
We have developed an optical heterodyning experiment for the undergraduate physics laboratory curriculum that permits observation of optical beat phenomena associated with the interference of two light beams with slightly different frequencies. For optical beat frequencies below 10 Hz the interference of the light beams is observed on a viewing screen as a slowly drifting Michelson interference fringe pauern. For beat frequencies greater than 10 Hz the drift ofthe interference fringes is toodoi:10.1117/12.57884 fatcat:f3zx4upfebblnc7tmjk4exydla