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It can be presumed that the word "plate" is referring to the degree of uniformity delivered by the float glass process. The first automated plate glass was made in 1848 by Henry Bessemer using a roller process. Uniformity was produced by grinding, as opposed to inherent material forces as occurs in modern float glass processes. If we presume that anything made prior to this time would suit the definition of 'plate' glass, then mirrors could not have occurred much sooner than this time.

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Q: When was the first plate glass mirror made?
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Continue Learning about General History

What do Egyptians call a mirror?

The y called it a looking glass because you could see yourself in it and glass is because it is made of galss.


What type of glass is on a mirror?

You can use any kind of glass to make a mirror - clear or colored, soda-lime or borosilicate, float glass or blown glass. Most mirrors are made out of float glass (standard window glass) coated with a layer of silver. The silver is protected by a layer of paint. Some manufacturers add a layer of copper between the silver and the paint to protect the silver from tarnishing. White metals like silver and aluminum reflect all the colors of light. You can also make a mirror with other metals, such as gold, copper or lead sulfide. Some telescopes and dental mirror are made with a layer of aluminum "sputtered" onto the front of the glass. You can see yourself in a mirror because the light rays that bounce off your face (or any object) bounce back to your eye when they hit the layer of metal instead of passing through as they do with transparent glass.


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Telescopes and microscopes were invented around the same time, by connecting pairs of lenses made from curved circles of glass (convex and concave lenses). Opaque tubes are used to limit light coming from outside the connected lenses.


What year was the first window made?

The first glass window was made in the Roman times! == ==


What is a magnifying glass made of?

the magnifying glass has a convex lens and it curves to magnify objects.

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