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  2. Luxottica - Wikipedia

    en.wikipedia.org/wiki/Luxottica

    Luxottica Group S.p.A. is an Italian eyewear conglomerate based in Milan. As a vertically integrated company, Luxottica designs, manufactures, distributes, and retails its eyewear brands all through its own subsidiaries. The company, presently organized as a subsidiary of EssilorLuxottica which formed when the Italian conglomerate merged with ...

  3. List of ISO 639 language codes - Wikipedia

    en.wikipedia.org/wiki/List_of_ISO_639_language_codes

    ISO 639 is a standardized nomenclature used to classify languages. Each language is assigned a two-letter (set 1) and three-letter lowercase abbreviation (sets 2–5). Part 1 of the standard, ISO 639-1 defines the two-letter codes, and Part 3 (2007), ISO 639-3, defines the three-letter codes, aiming to cover all known natural languages, largely superseding the ISO 639-2 three-letter code standard.

  4. Fresnel equations - Wikipedia

    en.wikipedia.org/wiki/Fresnel_equations

    The Fresnel equations give the ratio of the reflected wave's electric field to the incident wave's electric field, and the ratio of the transmitted wave's electric field to the incident wave's electric field, for each of two components of polarization. (The magnetic fields can also be related using similar coefficients.)

  5. Alcohol prohibition in India - Wikipedia

    en.wikipedia.org/wiki/Alcohol_prohibition_in_India

    In 2015, Chief Minister Okram Ibobi Singh stated in the Manipur state assembly that the state government was looking at the option of lifting prohibition in the state, but liquor ban still continued in the state. In December 2023, the Bharatiya Janata Party (BJP) government in the state has decided to lift the liquor ban after over 30 years.

  6. Alphabet Inc. - Wikipedia

    en.wikipedia.org/wiki/Alphabet_Inc.

    Alphabet Inc. is an American multinational technology conglomerate holding company headquartered in Mountain View, California.Alphabet is the world's second-largest technology company by revenue and one of the world's most valuable companies.

  7. Electromagnetic radiation - Wikipedia

    en.wikipedia.org/wiki/Electromagnetic_radiation

    Classically, electromagnetic radiation consists of electromagnetic waves, which are synchronized oscillations of electric and magnetic fields. In a vacuum, electromagnetic waves travel at the speed of light, commonly denoted c. There, depending on the frequency of oscillation, different wavelengths of electromagnetic spectrum are produced.

  8. Smoking ban - Wikipedia

    en.wikipedia.org/wiki/Smoking_ban

    Smoking ban. An internationally recognizable "no smoking" sign. An internationally recognizable black "authorization to smoke" sign. Smoking bans, or smoke-free laws, are public policies, including criminal laws and occupational safety and health regulations, that prohibit tobacco smoking in certain spaces. The spaces most commonly affected by ...

  9. Gamma ray - Wikipedia

    en.wikipedia.org/wiki/Gamma_ray

    In astrophysics, gamma rays are conventionally defined as having photon energies above 100 keV and are the subject of gamma-ray astronomy, while radiation below 100 keV is classified as X-rays and is the subject of X-ray astronomy . Gamma rays are ionizing radiation and are thus hazardous to life.

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