cuquerob21

2023-03-08

The refractive index of water is 1.33.The speed of light in water is?
A. $4×{10}^{8}m/s$
B. $3×{10}^{8}m/s$
C. $2.25×{10}^{8}m/s$
D. $1.33×{10}^{8}m/s$

fessetekxty

Since, $\mu =\frac{c}{v}=\frac{\text{speed of light in air}}{\text{speed of light in medium}}$
So, μv=c
or $v=\frac{c}{\mu }=\frac{3×{10}^{8}m/s}{1.33}=2.25×{10}^{8}m/s$

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