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- https://phys.libretexts.org/Courses/Georgia_State_University/GSU-TM-Introductory_Physics_II_(1112)/zz%3A_Back_Matter/10%3A_13.1%3A_Appendix_J-_Physics_Formulas_(Wevers)/1.06%3A_OpticsOptical components and the behaviour and properties of optical waves
- https://phys.libretexts.org/Learning_Objects/A_Physics_Formulary/Physics/06%3A_OpticsOptical components and the behaviour and properties of optical waves
- https://phys.libretexts.org/Courses/Coalinga_College/Physical_Science_for_Educators_(CID%3A_PHYS_14)/16%3A_Reflections_and_Refraction_of_Waves/16.02%3A_Optics/16.2.07%3A_Double_Convex_LensesAt least one of the faces is a part of a sphere; a convex lens is thicker at the center than the edges, and a concave lens is thicker at the edges than the center. If the object is placed inside F (be...At least one of the faces is a part of a sphere; a convex lens is thicker at the center than the edges, and a concave lens is thicker at the edges than the center. If the object is placed inside F (between F and the lens), the image will be on the same side of the lens as the object and it will be virtual, upright, and enlarged. For convex lenses, when the object is placed inside F, the image will be on the same side of the lens as the object and it will be virtual, upright, and enlarged.
- https://phys.libretexts.org/Courses/Coalinga_College/Physical_Science_for_Educators_(CID%3A_PHYS_14)/16%3A_Reflections_and_Refraction_of_Waves/16.02%3A_Optics/16.2.08%3A_Double_Concave_LensesThe first ray, shown above, begins from the tip of the image and travels to the lens parallel to the principal axis. The second ray also leaves from the tip of the object, and travels straight through...The first ray, shown above, begins from the tip of the image and travels to the lens parallel to the principal axis. The second ray also leaves from the tip of the object, and travels straight through the center of the lens. In the Contact Lens simulation below, the Lens Slider allows you to choose between a converging (convex) contact lens and a diverging (concave) contact lens.
