The human eye has an approximate angular resolution of $\phi = 5.8 \times 10^{-4}rad,$ and a typical photo printer prints a minimum of 300 dots per inch (1 inch =2.54 cm) . At what minimal distance z should a printed page be held so that one does not see the individual dots ?

Question

$\begin{array}{1 1} 14.5 \;cm \\ 14.5 \;m \\ 1.45\;cm \\ 1.45 \;m \end{array}$