Assertion: telescope's size | /r/HasProperty | linear dimension
Facets:
value: for optical microscopes
type: TRANSITIVE-OBJECT
value: for magnifying glasses
type: PURPOSE
value: by convention
type: CAUSE
Source sentences:
text: By convention, for magnifying glasses and optical microscopes, where the size of the object is a linear dimension and the apparent size is an angle, the magnification is the ratio between the apparent (angular) size as seen in the eyepiece and the angular size of the object when placed at the conventional closest distance of distinct vision: 25 cm from the eye.