Answer:
The correct option is;
2.26 × 10⁸
Step-by-step explanation:
The index of refraction, in a medium, n = The speed of light in air/(The speed of light in the medium)
The speed of light = 299792458 m/s
Given that the index of refraction of water = 1.33, we have;
1.33 = 299792458/(The speed of light in water)
The speed of light in water = 299792458/1.33 = 225407863.58 m/s ≈ 2.26 × 10⁸ m/s
The speed of light in water ≈ 2.26 × 10⁸ m/s
Therefore;
v ≈ 2.26 × 10⁸ m/s.