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The variation of refractive index vs. vacuum wavelength for various glasses. The wavelengths of visible light are shaded in grey. Influences of selected glass component additions on the mean dispersion of a specific base glass (n F valid for λ = 486 nm (blue), n C valid for λ = 656 nm (red)) [3]
Without the use of either trigonometry or a table of chords, Archimedes determines the Sun's apparent diameter by first describing the procedure and instrument used to make observations (a straight rod with pegs or grooves), [58] [59] applying correction factors to these measurements, and finally giving the result in the form of upper and lower ...
During this period he investigated the refraction of light, demonstrating that the multicoloured image produced by a prism, which he named a spectrum, could be recomposed into white light by a lens and a second prism. [63] Modern scholarship has revealed that Newton's analysis and resynthesis of white light owes a debt to corpuscular alchemy. [64]
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
Prism is the fourth studio album by American singer Katy Perry. It was released by Capitol Records on October 18, 2013. While the album was initially planned to be "darker" than her previous material, Prism ultimately became a prominently dance-inspired record. Perry worked with several past collaborators, while enlisting new producers and ...
A double play in which the pitcher (1) fields a batted ball and throws home to the catcher (2), who retires a runner advancing from third. The catcher then throws to the first baseman (3) to force out the batter.
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