Imatge:Dragonfly eye 3811.jpg

De Viquipèdia

Dragonfly_eye_3811.jpg (51KB, tipus MIME: image/jpeg)

Logo del projecte Wikimedia Commons
Aquest arxiu és una càrrega compartida, extreta del projecte Wikimedia Commons i pot ser usada per altres projectes.
Si voleu disposar de més informació sobre el fitxer, podeu visitar la pàgina original
GNU head Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled "GNU Free Documentation License".

العربية | Česky | Deutsch | English | Español | Français | Italiano | 日本語 | 한국어 | Nederlands | Polski | Português | Slovenčina | Svenska | עברית +/-

Dragonfly with compound eyes. Author: David L. Green

A compound eye is a visual organ found in certain arthropods. The compound eye consists of between 12 and 1,000 ommatidia, little dark/bright sensors. The image perceived by the arthropod is "recalculated" from the numerous ommatidia which point in slightly different directions. In contrast to other eye types, there is no central lens or retina. Though the resulting image is poor in resolution, it can detect quick movements and, in some cases, the polarization of light. Dragonflies have about 30,000 facets to their compound eyes, giving them nearly a 360° field of vision. Photo credit: David L. Green

m:Image:Dragonfly eye 3811.jpg

Les següents pàgines enllacen a aquesta imatge: