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Not known Factual Statements About Handicap

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The addition of barium also raises the refractive index. Thorium oxide presents glass a higher refractive index and low dispersion and was previously Employed in manufacturing superior-excellent lenses, but due to its radioactivity has been changed by lanthanum oxide in present day eyeglasses.[84] Iron is usually included into glass to https://doorsupplier24556.blogs-service.com/60617374/commercial-for-dummies

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