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- https://phys.libretexts.org/Bookshelves/Astronomy__Cosmology/Introduction_to_Astronomy_(Lumen)/05%3A_Telescope_and_ObservingThis page discusses telescopes, covering their history, types, optical mounts, and early observations while addressing light pollution. It highlights the importance of space-based telescopes like the ...This page discusses telescopes, covering their history, types, optical mounts, and early observations while addressing light pollution. It highlights the importance of space-based telescopes like the Hubble Space Telescope and their role in advancing astronomical research.
- 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/Bookshelves/Astronomy__Cosmology/Introduction_to_Astronomy_(Lumen)/05%3A_Telescope_and_Observing/5.10%3A_Hubble_Space_TelescopeThis page discusses the Hubble Space Telescope's early issues with its primary mirror, which affected its focus. A successful corrective optics installation by astronauts in December 1993 resolved the...This page discusses the Hubble Space Telescope's early issues with its primary mirror, which affected its focus. A successful corrective optics installation by astronauts in December 1993 resolved these problems, resulting in breathtaking images that have gained widespread admiration from astronomers and the public.
- https://phys.libretexts.org/Courses/University_of_California_Davis/UCD%3A_Physics_9B__Waves_Sound_Optics_Thermodynamics_and_Fluids/04%3A_Geometrical_Optics/4.01%3A_ImagesLight waves that are reflected or refracted change direction, which means that the eye that sees them sees them coming from a direction that does not backtrack to the actual source of the light. Here...Light waves that are reflected or refracted change direction, which means that the eye that sees them sees them coming from a direction that does not backtrack to the actual source of the light. Here we explore some basic cases where the location of the apparent source of light differs from the actual location of the source of the light.
- https://phys.libretexts.org/Courses/University_of_California_Davis/Physics_9B_Fall_2020_Taufour/04%3A_Geometrical_Optics/4.01%3A_ImagesLight waves that are reflected or refracted change direction, which means that the eye that sees them sees them coming from a direction that does not backtrack to the actual source of the light. Here...Light waves that are reflected or refracted change direction, which means that the eye that sees them sees them coming from a direction that does not backtrack to the actual source of the light. Here we explore some basic cases where the location of the apparent source of light differs from the actual location of the source of the light.
- https://phys.libretexts.org/Courses/Coalinga_College/Physical_Science_for_Educators_(CID%3A_PHYS_14)/16%3A_Reflections_and_Refraction_of_Waves/16.04%3A_End_of_Chapter_Key_TermsLaw of Reflection: States that the angle of incidence (the angle at which a wave hits a surface) is equal to the angle of reflection (the angle at which the wave bounces off). Snell's Law: Describes t...Law of Reflection: States that the angle of incidence (the angle at which a wave hits a surface) is equal to the angle of reflection (the angle at which the wave bounces off). Snell's Law: Describes the relationship between the angles of incidence and refraction, stating that the ratio of the sines of these angles is equal to the ratio of the indices of refraction of the two media.
- 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/16.2.06%3A_Convex_MirrorsIn convex mirrors, the reflecting surface is on the outside of the sphere, making the center of curvature and the focal point on the opposite side of the mirror from the object. For convex mirrors, th...In convex mirrors, the reflecting surface is on the outside of the sphere, making the center of curvature and the focal point on the opposite side of the mirror from the object. For convex mirrors, the reflecting surface is on the outside of the sphere, placing the center of curvature and the focal point on the opposite side of the mirror from the object. Since the focal point is on the opposite side of the mirror from the object, the focal length is assigned a negative number.
