Recently, I asked about the speed of light in M/S here, and now I’m asking about the speed of light in water – it’s just fascinating to me 😀
So, what’s the speed of light in water? Does water make light travel slower?
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Recently, I asked about the speed of light in M/S here, and now I’m asking about the speed of light in water – it’s just fascinating to me 😀
So, what’s the speed of light in water? Does water make light travel slower?
Light travels at 299,792,458 m/s in a vaccuum/air which has a refractive index of 1.0.
Water has a refractive index of 1.3. Basically, the higher the refractive index of a material, the slower light can travel in it. That said, the speed of light slows down to around 225,000,000 m/s in water – so, yes, water makes light travel slower!