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2. Dispersion (optics) - Wikipedia

   en.wikipedia.org/wiki/Dispersion_(optics)

   It is possible to calculate the group velocity from the refractive-index curve n(ω) or more directly from the wavenumber k = ωn/c, where ω is the radian frequency ω = 2πf. Whereas one expression for the phase velocity is v p = ω / k , the group velocity can be expressed using the derivative : v g = dω / dk .

3. Liquid-crystal display - Wikipedia

   en.wikipedia.org/wiki/Liquid-crystal_display

   Reflective surface to send light back to viewer. (In a backlit LCD, this layer is replaced or complemented with a light source.) A liquid-crystal display (LCD) is a flat-panel display or other electronically modulated optical device that uses the light-modulating properties of liquid crystals combined with polarizers.

4. Young's modulus - Wikipedia

   en.wikipedia.org/wiki/Young's_modulus

   Young's modulus (or Young modulus) is a mechanical property of solid materials that measures the tensile or compressive stiffness when the force is applied lengthwise. It is the modulus of elasticity for tension or axial compression. Young's modulus is defined as the ratio of the stress (force per unit area) applied to the object and the ...

5. Archimedes - Wikipedia

   en.wikipedia.org/wiki/Archimedes

   Archimedes of Syracuse [a] (/ ˌ ɑːr k ɪ ˈ m iː d iː z / AR-kim-EE-deez; [2] c. 287 – c. 212 BC) was an Ancient Greek mathematician, physicist, engineer, astronomer, and inventor from the ancient city of Syracuse in Sicily. [3]

6. Glossary of baseball terms - Wikipedia

   en.wikipedia.org/wiki/Glossary_of_baseball_terms

   At-bats (or "times at bat") are used for the calculation of a player's batting average and slugging percentage. Note that a plate appearance is not recorded as an "at-bat" if the batter reaches first base as a result of a base on balls , or hit by pitch , nor if he executes a sacrifice bunt or sacrifice fly .

7. List of All Elite Wrestling personnel - Wikipedia

   en.wikipedia.org/wiki/List_of_All_Elite...

   All Elite Wrestling (AEW) is an American professional wrestling promotion founded in 2019. AEW personnel consists of professional wrestlers, managers, referees, commentators (including Spanish, French and German commentators), ring announcers, coaches, and various other positions. Executives are also listed.

8. List of inventors - Wikipedia

   en.wikipedia.org/wiki/List_of_inventors

   Benjamin Franklin (1706–1790), U.S. – the pointed lightning rod conductor, bifocal glasses, the Franklin stove, the glass harmonica; Herman Frasch (1851–1914), Germany / U.S. – Frasch process (petrochemistry), Paraffin wax purification

9. Ray Bradbury - Wikipedia

   en.wikipedia.org/wiki/Ray_Bradbury

   Ray Douglas Bradbury (US: / ˈ b r æ d b ɛr i / BRAD-berr-ee; August 22, 1920 – June 5, 2012) was an American author and screenwriter.One of the most celebrated 20th-century American writers, he worked in a variety of genres, including fantasy, science fiction, horror, mystery, and realistic fiction.