Light is travelling in water, which has an index of refraction of 1.333. How fast does light travel in water?

1 Answer
Apr 4, 2018

#2.25*10^8 \ "m/s"#

Explanation:

We use the refractive index equation, which states that

#n=c/v#

  • #c# is the speed of light in a vacuum

  • #v# is the speed of light through the medium

An dso,

#1.333=(3*10^8 \ "m/s")/v#

#v=(3*10^8 \ "m/s")/1.333#

#~~2.25*10^8 \ "m/s"#