Assertion: lens | /r/HasProperty | biconcave
Facets:
Source sentences:
text: A lens with two concave surfaces is biconcave (or just concave).
text: If the lens is biconcave or plano-concave, a collimated beam of light passing through the lens is diverged (spread); the lens is thus called a negative or diverging lens.
text: A lens with two concave surfaces is biconcave (or just concave).
text: If the lens is biconcave or plano-concave, a collimated beam of light passing through the lens is diverged (spread); the lens is thus called a negative or diverging lens.