Point out that the refracting telescope uses lenses while the reflector uses mirrors and emphasize that these are optical telescopes... they collect light from distant objects.
(the reflector; uses; mirrors) (the reflector; emphasize; that these are optical telescopes) Context(the reflector emphasize,List([58, 98))):(these; are; optical telescopes) Context(the reflector emphasize,List([58, 98))):(they; collect; light from distant objects)
the reflector emphasize,List([58, 98)) the reflector emphasize,List([58, 98))
the reflector the reflector these they
uses emphasize are collect
mirrors
that these are optical telescopes
optical telescopes
light from distant objects