The refractive index of water is 4/3. What will be the velocity of light in water in m/s?

1.25 x \( {10 }^{ 8} \) 1.25 x \( {10 }^{ 6} \) 2.25 x \( {10 }^{ 6} \) 2.25 x \( {10 }^{ 8} \)

2.25 x \( {10 }^{ 8} \)

Use :  μ = c/v v = c/μ    =3.0 x \( {10 }^{ 8} \) m/s/ (4/3)    =2.25 x \( {10 }^{ 8} \) m/s