A light pulse takes to travel through an unknown liquid

PHYSICS · Subjective · A Level · Physics · Waves · Waves

Problem

A light pulse takes

4.0\,\text{ns}

to travel

1.0\,\text{m}

through an unknown liquid. Determine the absolute refractive index of the liquid. (Speed of light in vacuum

=3.0\times10^8\,\text{m\,s}^{-1}

.)

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