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2. Mirror - Wikipedia

   en.wikipedia.org/wiki/Mirror

   A mirror reflecting the image of a vase A first-surface mirror coated with aluminium and enhanced with dielectric coatings. The angle of the incident light (represented by both the light in the mirror and the shadow behind it) exactly matches the angle of reflection (the reflected light shining on the table). 4.5-metre (15 ft)-tall acoustic mirror near Kilnsea Grange, East Yorkshire, UK, from ...

3. Pixel - Wikipedia

   en.wikipedia.org/wiki/Pixel

   The word pixel is a combination of pix (from "pictures", shortened to "pics") and el (for "element"); similar formations with ' el' include the words voxel [4] 'volume pixel', and texel 'texture pixel'. [4] The word pix appeared in Variety magazine headlines in 1932, as an abbreviation for the word pictures, in reference to movies. [5]

4. 35 mm equivalent focal length - Wikipedia

   en.wikipedia.org/wiki/35_mm_equivalent_focal_length

   A standard 35 mm film image is 36 mm wide by 24 mm tall (35 mm refers to the height of the film including the perforations for film transport), and the diagonal is 43.3 mm. This leads to the following conversion formulas for a lens with a true focal length f: Image size. diagonal-based EFL. width-based EFL.

5. AOL Mail

   mail.aol.com

   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

6. Angle of view (photography) - Wikipedia

   en.wikipedia.org/wiki/Angle_of_view_(photography)

   Ultra wide angle lens is a rectilinear which is less than 24 mm of focal length in 35 mm film format, here 14 mm gives 114° and 24 mm gives 84° . Wide-angle lenses (24–35 mm in 35 mm film format) cover between 84° and 64° Normal, or Standard lenses (36–60 mm in 35 mm film format) cover between 62° and 40°

7. Curved mirror - Wikipedia

   en.wikipedia.org/wiki/Curved_mirror

   A curved mirror is a mirror with a curved reflecting surface. The surface may be either convex (bulging outward) or concave (recessed inward). Most curved mirrors have surfaces that are shaped like part of a sphere, but other shapes are sometimes used in optical devices. The most common non-spherical type are parabolic reflectors, found in ...

8. Optics - Wikipedia

   en.wikipedia.org/wiki/Optics

   Optics is the branch of physics that studies the behaviour and properties of light, including its interactions with matter and the construction of instruments that use or detect it. [1] Optics usually describes the behaviour of visible, ultraviolet, and infrared light. Light is a type of electromagnetic radiation, and other forms of ...

9. William Herschel - Wikipedia

   en.wikipedia.org/wiki/William_Herschel

   From the back garden of his house in New King Street, Bath, and using a 6.2-inch aperture (160 mm), 7-foot-focal-length (2.1 m) (f/13) Newtonian telescope "with a most capital speculum" of his own manufacture, [29] in October 1779, Herschel began a systematic search for such stars among "every star in the Heavens", [28]: 5 with new discoveries ...