Refraction and speed of light (2759)

, por F_y_Q

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The refractive index of green light in water is 1.42. What is its speed when it travels through water?

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

P.-S.

The formula for calculating the refractive index is:

\color[RGB]{2,112,20}{\bm{n = \frac{c}{v}}}

Solving the equation to determine the speed of light:

{\color[RGB]{2,112,20}{\bm{v = \frac{c}{n}}}} = \frac{300\ 000\ \frac{km}{s}}{1.42} = \fbox{\color[RGB]{192,0,0}{\bm{211\ 268\ \frac{km}{s}}}}