Assertion: newtonian telescope's mirror | /r/CapableOf | create image
Facets:
value: at the focal plane
type: LOCATION
Source sentences:
text: A curved primary mirror is the reflector telescope's basic optical element that creates an image at the focal plane.
text: A reflector is an optical telescope consisting of a large concave mirror that produces an image that is magnified by the eyepiece.
text: It is a single optical surface of the primary mirror that creates the image, while the flat merely directs light out to the side, to an accessible observing location.
text: It is difficult to manufacture the hyperbolic mirrors that create such images, so these scopes are more expensive than other reflecting telescopes of the same aperture.