Gravitational Index of Refraction

Contents 0:00 Introduction 0:20 Gravitational lensing 2:35 Gravitational potential 7:37 Refraction simulations 8:37 Gravitational index of refraction 12:11 Simulating gravitational lensing using a refractive index 13:45 Spatial refractive index vs General Relativity The idea of a Gravitational Index of Refraction is not new. Here is a reference to article by Reffer (date unknown but after 2018): Links to other nice videos on Refractive index: 3Blue1Brown: Terra Physica: Looking Glass Universe: Wave simulations were made using the python scrip provided by @DiffractionLimited YouTube channel. Link to the code download: Animation of the quarks at the end of the video by Arts at MIT. Music used: Cat Circus - Doug Maxwell Always Remember to Never Forget - The Whole Other Yoga style - Chris Haugen In the video, the simulations were sometimes paused to relieve the YouTube compression algorithm and the viewers' eyes a bit. Did I forget anything? Let me know and I'll set it straight.