Question

The absolute refractive index of water is 1.33. What is the velocity of light in water?

(Velocity of light in vacuum = 3 x 10⁸ m/s)

Answer 1

Give Data:

v₁ = 3 × 10⁸ m/s

n = 1.33

v₂ = ?

Formula:

`n = (v_1)/(v_2)`

Solution:

`n = (v_1)/(v_2)`

1.33 = `(3 xx10^8)/v_2` 

`v_2 = (3 xx 10^8)/1.33`

v₂ = 2.25 × 10⁸ m/s (Velocity of light in water)