Refracting telescopes work with a combination of convex lenses - light passes through the lens at the end of the tube, which focuses it at the eyepiece sticking out the other end of the tube.
(the tube; focuses; it; at the eyepiece) (Refracting telescopes; work; with a combination of convex lenses - light passes; through the lens)
the tube Refracting telescopes
focuses work
it at the eyepiece
with a combination of convex lenses - light passes through the lens