Assertion: lens | /r/ObjectUse | used as magnifying glass
Facets:
Source sentences:
text: Using a positive lens of focal length f, a virtual image results when S 1 < f, the lens thus being used as a magnifying glass (rather than if S 1 >> f as for a camera).
text: Using a positive lens of focal length f, a virtual image results when S 1 < f, the lens thus being used as a magnifying glass (rather than if S 1 >> f as for a camera).