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2. One-way mirror - Wikipedia

   en.wikipedia.org/wiki/One-way_mirror

   One-way mirrors for upper-level observation deck viewing down into a classroom (University of Wisconsin-Eau Claire) A one-way mirror, also called two-way mirror [1] (or one-way glass, half-silvered mirror, and semi-transparent mirror), is a reciprocal mirror that appears reflective from one side and transparent from the other. The perception of ...

3. Second- and third-class facilities on the Titanic - Wikipedia

   en.wikipedia.org/wiki/Second-_and_third-class...

   [8] [9] Shared staterooms were segregated by sex, so that single women or men often shared staterooms with one another. Unlike in first class, which offered many staterooms with private bathrooms, second-class bathroom facilities were all shared. Communal lavatories and bathrooms were separated by companionways and divided by sex.

4. Sconce (light fixture) - Wikipedia

   en.wikipedia.org/wiki/Sconce_(light_fixture)

   A sconce or wall light is a decorative light fixture that is mounted to a wall. [1] The sconce is a very old form of fixture, historically used with candles and oil lamps. They can provide general room lighting, and are common in hallways and corridors, but they may be mostly decorative. [1] A sconce may be a traditional torch, cresset, candle ...

5. First-class facilities of the Titanic - Wikipedia

   en.wikipedia.org/wiki/First-class_facilities_of...

   Mirrors were installed within the panelling imitating windows and the room was divided into bays along either side with oval mirrors inset. Along the forward wall was a large buffet with a peach-coloured marble top and along the aft wall was a raised bandstand for the orchestra, with buffets on either side containing the silver service and ...

6. Primary mirror - Wikipedia

   en.wikipedia.org/wiki/Primary_mirror

   The largest optical telescope in the world as of 2009 to use a non-segmented single-mirror as its primary mirror is the 8.2 m (27 ft) Subaru telescope of the National Astronomical Observatory of Japan, located in Mauna Kea Observatory on Hawaii since 1997; [3] [better source needed] however, this is not the largest diameter single mirror in a telescope, the U.S./German/Italian Large Binocular ...

7. Rectangular potential barrier - Wikipedia

   en.wikipedia.org/wiki/Rectangular_potential_barrier

   In quantum mechanics, the rectangular (or, at times, square) potential barrier is a standard one-dimensional problem that demonstrates the phenomena of wave-mechanical tunneling (also called "quantum tunneling") and wave-mechanical reflection.