Through two doors How a sunbeam split in two became physics’ most elegant experiment

https://aeon.co/essays/the-elegant-physics-experiment-to-decode-the-nature-of-reality?utm_source=Aeon+Newsletter&utm_campaign=a0914a4bb7-EMAIL_CAMPAIGN_2018_10_03_05_06&utm_medium=email&utm_term=0_411a82e59d-a0914a4bb7-69623653