## College Physics (4th Edition)

It takes $1.67~nanoseconds$ for light to travel from the text to the eye.
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.