Assertion: telescope's image | /r/HasProperty | formed behind primary mirror
Facets:
value: outside of the telescope tube
type: LOCATION
value: for telescopes
type: TRANSITIVE-OBJECT
value: outside
type: LOCATION
Source sentences:
text: It takes the name “Cassegrain” because its image is formed outside behind the primary mirror.
text: For telescopes built to the Cassegrain design or other related designs, the image is formed behind the primary mirror, at the focal point of the secondary mirror.
text: The image is formed behind the primary mirror, which has a central perforation.
text: The image is then formed outside of the telescope tube behind the primary mirror.
text: The image is formed behind the primary mirror, which has a central perforation.