[list][*][url=https://www.geogebra.org/material/simple/id/4581]plane mirror[/url] (ukukuku);[/*][*][url=https://www.geogebra.org/material/simple/id/sd8RWafG]spherical aberration and paraxial approximation[/url] (pfb);[/*][*][url=https://www.geogebra.org/material/simple/id/bcwbHhyw]Snell's law of refraction[/url] (pfb);[/*][*][url=https://ggbm.at/VAmeZJGt]Snell's law of refraction - wavefronts (pfb)[/url];[br][/*][*][url=https://ggbm.at/Y2252Bp5]Huygens' principle and Snell's law of refraction[/url] (pfb);[br][/*][*][url=https://phet.colorado.edu/sims/html/bending-light/latest/bending-light_en.html]bending light[/url] (PhET);[br][/*][*]refraction and mirages (images); [b]inferior image[/b]: [url=http://www.weatherstock.com/phenomenon-gallery/slides/PH-12.JPG]example[/url] and [url=https://asadullahali.files.wordpress.com/2016/02/inferior-mirage-1.png]explanation[/url]; [b]superior mirage[/b] (fata morgana): [url=http://cdnt3m-a.akamaihd.net/tem/warehouse/791/C60/9/791C609_0466_lt.jpg]example[/url] and [url=https://geekswipe.net/wp-content/uploads/2015/10/Superior-Mirage.png]explanation[/url]; [/*][/list][list][*][url=https://phet.colorado.edu/sims/geometric-optics/geometric-optics_en.html]convex lens, real and virtual images[/url] (PhET);[br][/*][/list][list][*][url=https://www.geogebra.org/material/simple/id/81245]convex/concave lens[/url] (ukukuku);[/*][/list][list][*][url=https://www.geogebra.org/material/simple/id/685665]optics of the human eye[/url] (ukukuku);[/*][*][url=http://www.sciences.univ-nantes.fr/sites/genevieve_tulloue/optiqueGeo/instruments/correction.php]optics of the human eye and vision problems[/url] (G. Tulloue, French)[br][/*][*][url=http://www.sciences.univ-nantes.fr/sites/genevieve_tulloue/optiqueGeo/lentilles/doublet.php]a pair of lenses[/url] (G. Tulloue, French);[/*][*][url=http://www.sciences.univ-nantes.fr/sites/genevieve_tulloue/optiqueGeo/instruments/microscope.php]microscope[/url] (G. Tulloue, French);[/*][*][url=http://www.sciences.univ-nantes.fr/sites/genevieve_tulloue/optiqueGeo/instruments/lunette_astro.php]telescope[/url] (G. Tulloue, French);[br][/*][*][url=https://www.geogebra.org/material/simple/id/4200]dispersion of light[/url] (ukukuku);[/*][*][url=https://www.geogebra.org/material/simple/id/7162]rainbow formation[/url] (ukukuku);[/*][*][url=https://www.geogebra.org/material/simple/id/777419]rainbow formation, 3D[/url] (ukukuku);[/*][*][url=http://www.sciences.univ-nantes.fr/sites/genevieve_tulloue/optiqueGeo/arc_en_ciel/arc_en_ciel.php]arc-en-ciel[/url] (G. Tullue, French);[br][/*][/list]