Velocity of light in air is 3×10’8.refractive index of water is 1.33.the time taken by light to travel a distance of 500m in water

2 thoughts on “Velocity of light in air is 3×10’8.refractive index of water is 1.33.the time taken by light to travel a distance of 500m in water”

1. Explanation:

   refractive index of water = speed of light in air / speed of light in medium

   4/3 = 3 x 10⁸ / v

   v = 9 x 10⁸ /4 m/s

   v = distance / time

   time = distance / velocity

   =( 500 x 4 ) / 9 x 10⁸

   = 2000 / 9 x10⁸

   = 2/9 x 10^-5 s

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2. Answer:

   Refractive index = Speed of light in vaccum / Speed of light in water. It is denotes as n = c / v, v = c / n= 3 × 10^8 m/s / (1.33) = 2.25 × 10^8 m/s. Therefore, refractive index of the water can be measure by the Speed of light in water is 2.25 × 10^8 m/s.

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