Answer
It takes $1.67~nanoseconds$ for light to travel from the text to the eye.
Work Step by Step
We can find the time it takes for light to travel from the text to the eye:
$t = \frac{d}{c}$
$t = \frac{0.50~m}{3.0\times 10^8~m/s}$
$t = 1.67\times 10^{-9}~s$
$t = 1.67~ns$
It takes $1.67~nanoseconds$ for light to travel from the text to the eye.
