Light travels through water in a beaker. The height of the water column is $h$. If the refractive index of water is $\mu_{w}$ and $C$ is the velocity of light in air,the time taken by light to travel through the water will be:
- A$\frac{\mu_{w} h}{C}$
- B$h \mu_{w} C$
- C$\frac{hC}{\mu_{w}}$
- D$\frac{h}{\mu_{w} C}$
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