Assertion: telescope aperture | /r/HasProperty | the distance
Facets:
value: for a reflecting type telescope
type: OTHER
value: for a refracting type telescope
type: PURPOSE
Source sentences:
text: For a refracting type telescope, the telescope aperture is the distance measured across the widest point of the objective lens.
text: For a reflecting type telescope, the telescope aperture is the distance measured across the widest point of the objective mirror.