Assertion: telescope | /r/CapableOf | use lense
Facets:
value: to focus the light
type: PURPOSE
value: in refracting
type: PURPOSE
Source sentences:
text: Refracting telescopes, i.e., telescopes that use lenses, can suffer from problems of chromatic and other aberrations, which reduce the quality of the image.
text: In refracting, the telescope uses the lens to focus the light towards the end.
text: All telescopes use either a lens or a mirror (some use both) to gather incoming light and to form an image from that light.
text: The earliest telescopes, as well as many amateur telescopes today, use lenses to gather more light than the human eye could collect on its own.