Problem
What is the speed of light in a medium with an index of refraction \( n=1.50 \) ? \( 2.00 \times 10^{8} \mathrm{~m} / \mathrm{s} \) \( 5.00 \times 10^{7} \mathrm{~m} / \mathrm{s} \) \( 1.50 \times 10^{8} \mathrm{~m} / \mathrm{s} \) \( 4.50 \times 10^{8} \mathrm{~m} / \mathrm{s} \)
Solution
Step 1 ：\( v = \frac{c}{n} \)
Step 2 ：\( v = \frac{3.00 \times 10^{8} \mathrm{~m} / \mathrm{s}}{1.50} \)
Step 3 ：\( v = 2.00 \times 10^{8} \mathrm{~m} / \mathrm{s} \)
