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2. Wallpaper group - Wikipedia

   en.wikipedia.org/wiki/Wallpaper_group

   Reflections, or mirror isometries, denoted by F L, where L is a line in R 2. (F is for "flip"). This has the effect of reflecting the plane in the line L, called the reflection axis or the associated mirror. Glide reflections, denoted by G L,d, where L is a line in R 2 and d is a distance.

3. Cheval mirror - Wikipedia

   en.wikipedia.org/wiki/Cheval_mirror

   The mirror hangs between two vertical columns frequently connected by two horizontal planks in a frame-like arrangement. Each column rests on two splayed feet. The mirror features a tilt mechanism so that it can be used at different angles, and sometimes also has a height adjustment pulley with lead counterweights.

4. 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 ...

5. List of longest buildings - Wikipedia

   en.wikipedia.org/wiki/List_of_longest_buildings

   Thermal power stations in the former Soviet Union often also have long buildings. According to Wikimapia the building of Ekibastuz GRES-1 in Kazakhstan is 537 metres (1,762 ft) long, and that of the Luhansk power station north of Shchastia, Ukraine, is 672 metres (2,205 ft) long.

6. Mirror image - Wikipedia

   en.wikipedia.org/wiki/Mirror_image

   A mirror does not just produce an image of what would be there without it; it also changes the light distribution in the halfspace in front of and behind the mirror. A mirror hanging on the wall makes the room brighter because additional light sources appear in the mirror image.

7. Beveled glass - Wikipedia

   en.wikipedia.org/wiki/Beveled_glass

   A beveled glass mirror, ca. 1910. Beveled glass is usually made by taking thick glass and creating an angled surface cut around the entire periphery. [1] Bevels act as prisms in sunlight creating an interesting color refraction which both highlights the glass work and provides a spectrum of colors which would ordinarily be absent in clear float glass.