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# If the index of refraction of water is 1.33, what is the speed of light in water?

speed of light in water ##v=225,407,863.2" "##meter/second

Formula for refractive index

##n=c/v## where ##" " "n=" "##refractive index ##" "c=299792458" "##speed of light in a vacuum in ##" " ##meter per second ##" "v=##phase velocity of light in the medium

Solve for ##v##

##v=c/n## ##v=299792458/1.33## ##v=225,407,863.2" "##m/sec

God bless....I hope the explanation is useful.