A no-math explanation on how optical combs work and how they give us mind-bogglingly accurate atomic clocks. Pretty brain-twisting to see how quantum physics is at the heart of it. TL;DR, it's all due to optical beat frequencies and this still applies when its individual photons interacting to produce the beats.

https://arstechnica.com/science/2021/01/a-curious-observers-guide-to-quantum-mechanics-pt-2-the-particle-melting-pot/

#Physics #QuantumPhysics #Optics #OpticalCombs #AtomicClocks #Science