Problem

What is the speed of light in a medium with an index of refraction $n = 1.50$ ?
$2.00 \times 10^{8} m / s$
$5.00 \times 10^{7} m / s$
$1.50 \times 10^{8} m / s$
$4.50 \times 10^{8} m / s$

Answer

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Answer

$v = 2.00 \times 10^{8} m / s$

Steps

Step 1 ： $v = \frac{c}{n}$

Step 2 ： $v = \frac{3.00 \times 10^{8} m / s}{1.50}$

Step 3 ： $v = 2.00 \times 10^{8} m / s$

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