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  2. Abbe–Koenig prism - Wikipedia

    en.wikipedia.org/wiki/Abbe–Koenig_prism

    An Abbe–Koenig prism is a type of reflecting prism, used to invert an image (rotate it by 180°). They are commonly used in binoculars and some telescopes for this purpose. The prism is named after Ernst Abbe and Albert Koenig . The prism is made from two glass prisms, which are optically cemented together to form a symmetric, shallow Vee ...

  3. Talk:Laser pointer - Wikipedia

    en.wikipedia.org/wiki/Talk:Laser_pointer

    Denmark goalkeeper targeted by green laser pen during European Championship semi final This article was edited anonymously from IP 152.115.67. 134 on Thursday 8 July as follows: "English Football fans favor (sic) the green color (sic), as it as (sic) somewhat camouflaged against the green pitch, but when in the eyes of the opposing team, it ...

  4. Bonferroni correction - Wikipedia

    en.wikipedia.org/wiki/Bonferroni_correction

    The Bonferroni correction compensates for that increase by testing each individual hypothesis at a significance level of , where is the desired overall alpha level and is the number of hypotheses. [4] For example, if a trial is testing hypotheses with a desired overall , then the Bonferroni correction would test each individual hypothesis at .

  5. Phonograph - Wikipedia

    en.wikipedia.org/wiki/Phonograph

    The phonograph was invented in 1877 by Thomas Edison. Phonograph use would grow the following year. Alexander Graham Bell's Volta Laboratory made several improvements in the 1880s and introduced the graphophone, including the use of wax-coated cardboard cylinders and a cutting stylus that moved from side to side in a zigzag groove around the record. In the 1890s, Emile Berliner initiated the ...

  6. Optical disc drive - Wikipedia

    en.wikipedia.org/wiki/Optical_disc_drive

    t. e. In computing, an optical disc drive is a disc drive that uses laser light or electromagnetic waves within or near the visible light spectrum as part of the process of reading or writing data to or from optical discs. Some drives can only read from certain discs, but recent drives can both read and record, also called burners or writers ...

  7. Laser science - Wikipedia

    en.wikipedia.org/wiki/Laser_science

    Laser science or laser physics is a branch of optics that describes the theory and practice of lasers. [ citation needed ] Laser science is principally concerned with quantum electronics , laser construction , optical cavity design, the physics of producing a population inversion in laser media , and the temporal evolution of the light field in ...