![File:Focal-length.svg](http://upload.luquay.com/wikipedia/commons/thumb/8/8b/Focal-length.svg/198px-Focal-length.svg.png)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 09:01, 5 December 2020 | ![]() | 512 × 1,545 (17 KB) | A loose necktie | My previous change also required a change in the focal point (F) and focal distance (f) in the resulting convex lens. Have now corrected for this as well. |
08:53, 5 December 2020 | ![]() | 512 × 1,545 (17 KB) | A loose necktie | Corrected path of light through concave lens. It bends twice, not just once. | |
08:08, 12 March 2008 | ![]() | 180 × 543 (46 KB) | Henrik~commonswiki | {{Information |Description='''Focal length''' {{es|El foco '''F''' y la distancia focal ''f'' de una lente positiva, una lente negativa, un espejo cóncavo, y un espejo convexo.}} {{en|The focus F and the focal length f of a positive lens, a negativ |
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