Refraction and velocity of light 0001

, por F_y_Q

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The refractive index of green light in water is 1,42. What is its velocity when it travels through water?

(Velocity of light in a vacuum is 300 000 km/s).

P.-S.

The refractive index is: n = \frac{c}{v}
Solving for velocity: v = \frac{c}{n} = \frac{300\ 000\ \frac{km}{s}}{1,42} = \bf 211\ 268\ \frac{km}{s}