Comment on I can whistle at the speed of sound

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tacosplease@lemmy.world ⁨1⁩ ⁨month⁩ ago

Adding to the fun - The light is still going the same speed within the medium, but it’s bumping into more things. Those collisions divert the light, lengthening the distance it travels through something like 1 cm of glass vs 1 cm in a vacuum. It changes the time it takes to travel through glass rather than the speed at which the light is moving.

At least that’s what I remember from a YouTube video.

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