X-rays "faster" than the speed of light, and more refractive index questions
Optics puzzles part 4
I made a follow-up to the last video about the index of refraction, answering a few questions people had about the topic. Why does light slowing down imply that it will bend (if you want something better than the angled-car-into-mud analogy)? What’s going on with birefringence? What’s the end of the barber pole explanation? And, most fun of all, how is it possible for this refractive index to be lower than 1?