Using a refracting telescope, you observe the planet Mars when it is $2\mathrm{.}1910"$ m from Earth. The diameter of the telescope's

objective lens is $0\mathrm{.}959$ m$.$

Use $555$ nm for the wavelength of light.

What is the minimum feature size x on the surface of Mars,

measured in kilometers, that your telescope can resolve

for you?

x $=$

km