How big is a visible #Photon?

https://www.youtube.com/watch?v=SDtAh9IwG-I&ab_channel=HuygensOptics

#Physics #Optics #Experiment #Laser #LaserBeam #BeamSplitter #InterferencePattern #InterferencePatterns #DoubleSlit #DoubleSlitExperiment #Photons #Electromagnetism #Phase #PhaseDifference #Measurement #ShotNoise