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looks at all the associated Wikipedia pages, the links on all those pages, and lists the Wikidata items corresponding to the link targets.
Q15646769 - concave mirror
Searching link targets on 8 Wikipedias...
| Item | Label [en] | Wikilabels | Link # |
|---|---|---|---|
Q35197 [CC |  ] | mirror | Spiegel | مرآة | 鏡 | กระจกเงา | 4 |
| Q35221 [CC | ] | reflecting telescope | Spiegelteleskop | مقراب عاكس | 反射望遠鏡 | กล้องโทรทรรศน์สะท้อนแสง | 4 |
| Q1783529 [CC | ] | convex mirror | Konvexspiegel | مرآة محدبة | 凸面鏡 | 3 |
| Q1087850 [CC | ] | parabolic reflector | Parabolspiegel | 放物面鏡 | จานสะท้อนแบบพาราโบลา | 3 |
| Q1860 [CC | ] | English | اللغة الإنجليزية | 英語 | ภาษาอังกฤษ | 3 |
| Q2913798 [CC | ] | spherical aberration | زيغ كروي | 球面収差 | ความคลาดทรงกลม | 3 |
| Q11104 [CC | ] | Al-Hassan Ibn Al-Haytham | Alhazen | ابن الهيثم | 2 |
| Q8739 [CC | ] | Archimedes | Archimedes | أرخميدس | 2 |
| Q193540 [CC | ] | focal length | Brennweite | بعد بؤري | 2 |
| Q36578 [CC | ] | Integrated Authority File | Gemeinsame Normdatei | 2 |
| Q964338 [CC | ] | plane mirror | Planspiegel | مرآة مستوية | 2 |
| Q173817 [CC | ] | radius | Radius | نصف القطر | 2 |
| Q9128 [CC | ] | light | Licht | ضوء | 2 |
| Q855248 [CC | ] | solar furnace | 太陽炉 | เตารังสีแสงอาทิตย์ | 2 |
| Q192768 [CC | ] | paraboloid | 放物面 | ทรงพาราโบลา | 2 |
| Q1506584 [CC | ] | curved mirror | 球面鏡 | Curved mirror | 2 |
| Q639 [CC | ] | optical aberration | Abbildungsfehler | 1 |
| Q306550 [CC | ] | Abbildungsgleichung | Abbildungsgleichung | 1 |
| Q188771 [CC | ] | French Academy of Sciences | Académie des sciences | 1 |
| Q419793 [CC | ] | accommodation | Akkommodation (Auge) | 1 |
| Q614278 [CC | ] | classified advertising | Anzeige (Medien) | 1 |
| Q560808 [CC | ] | aspheric lens | Asphärische Linse | 1 |
| Q131478 [CC | ] | Der Spiegel | Der Spiegel | 1 |
| Q190909 [CC | ] | focus | Fokus | 1 |
| Q1454196 [CC | ] | No label in en! | Freiformreflektor | 1 |
| Q506254 [CC | ] | naked eye viewing | Freiäugig | 1 |
| Q1349855 [CC | ] | No label in en! | Gegenstandsweite | 1 |
| Q613628 [CC | ] | primary mirror | Hauptspiegel | 1 |
| Q5762480 [CC | ] | Heinz Goerke | Heinz Goerke | 1 |
| Q461 [CC | ] | Internet Archive | Internet Archive | 1 |
| Q9637 [CC | ] | larynx | Kehlkopf | 1 |
| Q1784982 [CC | ] | No label in en! | Kosmetikspiegel | 1 |
| Q12507 [CC | ] | sphere | Kugel | 1 |
| Q768575 [CC | ] | lens | Linse (Optik) | 1 |
| Q62306 [CC | ] | Ludwig Aschoff | Ludwig Aschoff | 1 |
| Q166849 [CC | ] | magnifying glass | Lupe | 1 |
| Q898306 [CC | ] | monochromator | Monochromator | 1 |
| Q2920313 [CC | ] | optical system | Optische Abbildung | 1 |
| Q3410566 [CC | ] | optical axis | Optische Achse (Optik) | 1 |
| Q912034 [CC | ] | optical spectrometer | Optisches Spektrometer | 1 |
| Q11801024 [CC | ] | otoscopy | Otoskopie | 1 |
| Q2051219 [CC | ] | parabolic trough | Parabolrinne | 1 |
| Q1647083 [CC | ] | Paul Diepgen | Paul Diepgen | 1 |
| Q3384092 [CC | ] | Pierre Borel | Pierre Borel (Mediziner) | 1 |
| Q1142240 [CC | ] | real image | Reelles Bild | 1 |
| Q2168068 [CC | ] | paraboloid of revolution | Rotationsparaboloid | 1 |
| Q264562 [CC | ] | Book of Optics | Schatz der Optik | 1 |
| Q3887 [CC | ] | solar eclipse | Sonnenfinsternis | 1 |
| Q285927 [CC | ] | thermal solar power station | Sonnenwärmekraftwerk | 1 |
| Q306610 [CC | ] | n-sphere | Sphäre (Mathematik) | 1 |
| Q1544456 [CC | ] | mirror inverted image | Spiegelverkehrtes Bild | 1 |
| Q5689325 [CC | ] | head mirror | Stirnreflektor | 1 |
| Q1417028 [CC | ] | Optical path | Strahlengang | 1 |
| Q675287 [CC | ] | magnification | Vergrößerung (Optik) | 1 |
| Q44415 [CC | ] | virtual image | Virtuelles Bild | 1 |
| Q2062069 [CC | ] | web archiving | Web-Archivierung | 1 |
| Q226411 [CC | ] | Radius | Radius | 1 |
| Q205 [CC | ] | infinity | Unendlichkeit | 1 |
| Q23049164 [CC | ] | No label in en! | انعكاس (توضيح) | 1 |
| Q218275 [CC | ] | Focus | بؤرة (توضيح) | 1 |
| Q7797269 [CC | ] | three-mirror anastigmat | ثلاثة مرايا تمنع الاعوجاج | 1 |
| Q47528 [CC | ] | radar | رادار | 1 |
| Q40015 [CC | ] | solar energy | طاقة شمسية | 1 |
| Q12224471 [CC | ] | Convex lens | عدسة محدبة | 1 |
| Q413 [CC | ] | physics | فيزياء | 1 |
| Q48297 [CC | ] | parabola | قطع مكافئ | 1 |
| Q26540 [CC | ] | artificial satellite | قمر اصطناعي | 1 |
| Q837515 [CC | ] | solar thermal collector | مجمع شمسي حراري | 1 |
| Q351959 [CC | ] | lens formula | معادلة العدسة | 1 |
| Q4213 [CC | ] | telescope | مقراب | 1 |
| Q4262 [CC | ] | radio wave | موجة راديو | 1 |
| Q523 [CC | ] | star | نجم | 1 |
| Q648266 [CC | ] | Wayback Machine | واي باك مشين | 1 |
| Q946042 [CC | ] | searchlight | サーチライト | 1 |
| Q3568 [CC | ] | focus | 焦点 (幾何学) | 1 |
| Q2919513 [CC | ] | Chinese magic mirror | 魔鏡 | 1 |
| Q3674687 [CC | ] | convex lens | เลนส์นูน | 1 |
| Q235783 [CC | ] | flashlight | ไฟฉาย | 1 |