Statements (13)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb:mathematical_concept
|
| gptkbp:appliesTo |
optical systems
|
| gptkbp:describes |
effective focal length of a system of two lenses
|
| gptkbp:field |
gptkb:optics
|
| gptkbp:namedAfter |
gptkb:Allvar_Gullstrand
|
| gptkbp:publishedIn |
early 20th century
|
| gptkbp:relatedTo |
focal lengths of two lenses and their separation
|
| gptkbp:usedFor |
calculating combined power of separated lenses
|
| gptkbp:usedIn |
ophthalmology
optometry |
| gptkbp:bfsParent |
gptkb:Allvar_Gullstrand
|
| gptkbp:bfsLayer |
7
|
| https://www.w3.org/2000/01/rdf-schema#label |
Gullstrand's equation
|