Water has an index of refraction of 1.333.What is the speed of light through it? (c = 3.00 × 10⁸ m/s) A)4.00 × 10⁸ m/s B)2.25 × 10⁸ m/s C)4.46 × 10⁸ m/s D)1.46 × 10⁸ m/s

Question

Quizplus · Accepted Answer

The speed of light in a medium is given by $v = \frac{c}{n}$, where $c = 3.00 \times 10^8 \, \text{m/s}$ is the speed of light in vacuum and $n = 1.333$ is the index of refraction of water. Thus, $v = \frac{3.00 \times 10^8}{1.333} \approx 2.25 \times 10^8 \, \text{m/s}$.

Water Has an Index of Refraction of 1