Never use the coarse focus with the

Question $9.$ In this lab you used direct imaging procedure in which the primary image produced by the objective of the microscope falls directly on the sensitive surface of the camera. The light$-$sensitive surface of a MU$1000$ camera chip has the following dimensions: width $=6\mathrm{.}44mm$ and height $=4\mathrm{.}616mm.$ What is the pixel size $($in $m)$ of the camera sensor$?$ Show your work below.

$6\mathrm{.}44m\frac{m}{{10}^{-3}\frac{m}{{10}^6}(N)}\frac{?}{(m)}=644$