I don't know why light slows down in water
Looking Glass Universe
@lookingglassuniverseAbout
My name is Mithuna Yoganathan and I did my PhD in theoretical physics at the University of Cambridge. My channel is about the strange world of mathematics and science. For business enquiries, please email at looking (dot) glass (dot) universe (at) gmail.com I receive an overwhelming amount of email from people who have a theory of everything. I do not open these. If you would like to email about something else, feel free, but I can’t guarantee if/when I will reply- sorry!
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Video Description
Supported by Screen Australia and Youtube through the Skip Ahead initiative. Links to the other videos mentioned: Part 1 of this story: https://youtu.be/yP1kKN3ghOU 3Blue1Brown's explanation of Feynman's proof: https://www.youtube.com/watch?v=KTzGBJPuJwM Experiment: If you’d like to try the experiment I did at home then you’ll need a phone with Lidar or you can get a laser meter quite cheaply at a hardware store. If you use an iphone, the app I found most reliable for the measurement was this one: https://apps.apple.com/us/app/lidar-measuring/id1535032210 Code: The 3D simulation is here: https://github.com/mithuna-y/speed_of_light_in_a_medium/tree/main/multiple_layers References: The Feynman lectures- “Ch 31: On the origin of refractive index” and “Ch 48: Beats”
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