Multiple studies and foundational optical principles confirm that light waves can undergo interference and heterodyning to produce optical or quantum beats.
The claim that light waves can produce optical beats is a well-established phenomenon in optics and laser physics, often observed via optical heterodyning, frequency combs, and quantum beats between coherent states. Retrieved papers such as [5], [9], and [10] explicitly discuss beat frequencies, quantum beats, and heterodyning of optical waves. Therefore, the evidence strongly supports the claim.