Assertion: telescope's length | /r/HasProperty | given in millimeter
Facets:
Source sentences:
text: Generally expressed, focal length is the distance (given in millimeters) between the telescope's primary lens or mirror and the point where the light rays come together in focus.
text: Generally expressed, focal length is the distance (given in millimeters) between the telescope's primary lens or mirror and the point where the light rays come together in focus.