Image: Fourth Order Fresnel Lens, Nobska
Size of this preview: 390 × 599 pixels. Other resolutions: 156 × 240 pixels | 1,155 × 1,773 pixels.
Original image (1,155 × 1,773 pixels, file size: 1.64 MB, MIME type: image/jpeg)
Description: The light flashes every six seconds. Fresnel is pronounced as "Fruh-nel".
Title: Fourth Order Fresnel Lens, Nobska
Credit: Own work
Author: Pictowrit
Usage Terms: Creative Commons Attribution-Share Alike 3.0
License: CC BY-SA 3.0
License Link: http://creativecommons.org/licenses/by-sa/3.0
Attribution Required?: Yes
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