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Currently Playing: 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 Erratum: 1) The gravitational constant has a missing minus sign in the exponent. The value should be 6.7x10^-11 N.M^2.kg^-2. The idea of a Gravitational Index of Refraction is not new. Here is a reference to a recent article by D.H.W Reffer (date unknown but after 2018): https://vixra.org/pdf/1903.0407v2.pdf Links to other nice videos on Refractive index: 3Blue1Brown: https://www.youtube.com/watch?v=KTzGBJPuJwM Terra Physica: https://www.youtube.com/watch?v=JZ-90z8nzoI&t=267s Looking Glass Universe: https://www.youtube.com/watch?v=uo3ds0FVpXs Wave simulations were made using the python scrip provided by @DiffractionLimited YouTube channel. Link to the code download: https://github.com/0x23/WaveSimulator2D Animation of the dancing quarks at the end of the video by "Arts at MIT". Royalty free music used: Cat Circus - Doug Maxwell Always Remember to Never Forget - The Whole Other Yoga style - Chris Haugen Thanks very much for making this! End tune: Floating - Early Birds 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.