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2. Roof prism - Wikipedia

   en.wikipedia.org/wiki/Roof_prism

   A roof pentaprism used in Single-lens reflex cameras; the lower right face is the roof (dach). An Amici roof prism. A roof prism, also called a Dachkanten prism or Dach prism (from German: Dachkante, lit. "roof edge"), is a reflective prism containing a section where two faces meet at a 90° angle, resembling the roof of a building and thus the name.

3. Binoculars - Wikipedia

   en.wikipedia.org/wiki/Binoculars

   In binoculars with Schmidt–Pechan or Uppendahl roof prisms, mirror coatings are added to some surfaces of the roof prism because the light is incident at one of the prism's glass-air boundaries at an angle less than the critical angle so total internal reflection does not occur. Without a mirror coating most of that light would be lost.

4. List of roof shapes - Wikipedia

   en.wikipedia.org/wiki/List_of_roof_shapes

   Monitor roof: A roof with a monitor; 'a raised structure running part or all of the way along the ridge of a double-pitched roof, with its own roof running parallel with the main roof.' Butterfly roof (V-roof, [8] London roof [9]): A V-shaped roof resembling an open book. A kink separates the roof into two parts running towards each other at an ...

5. How Much Does a Roof Replacement Cost? 6 Ways To Make It ...

   www.aol.com/much-does-roof-replacement-cost...

   A solid, well-designed roof can add curb appeal and value, as well as protect you, your family and your possessions from the elements. Check... How Much Does a Roof Replacement Cost? 6 Ways To ...

6. Visual angle - Wikipedia

   en.wikipedia.org/wiki/Visual_angle

   Visual angle is the angle a viewed object subtends at the eye, usually stated in degrees of arc. It also is called the object's angular size . The diagram on the right shows an observer's eye looking at a frontal extent (the vertical arrow) that has a linear size S {\displaystyle S} , located in the distance D {\displaystyle D} from point O ...

7. Yes, You Can Rent Out Your Eye Socket For Money

   testkitchen.huffingtonpost.com/eyedynasty

   Inside America's Prosthetic Eye Dynasty. n November 1954, 29-year-old Sammy Davis Jr. was driving to Hollywood when a car crash left his eye mangled beyond repair. Doubting his potential as a one-eyed entertainer, the burgeoning performer sought a solution at the same venerable institution where other misfortunate starlets had gone to fill their vacant sockets: Mager & Gougelman, a family ...