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Chemical compound
Herapathite, or iodoquinine sulfate, is a chemical compound whose crystals are dichroic and thus can be used for polarizing light. Its formation was investigated
Herapathite
Optical filter device
effect is strongly wavelength dependent and the crystal appears coloured. Herapathite is also dichroic, and is not strongly coloured, but is difficult to grow
Polarizer
English surgeon and chemist
1868) was an English surgeon and chemist known for his discovery of Herapathite. Herapath was born in Bristol, the eldest son of William Herapath, Professor
William_Bird_Herapath
Optically active material
Land, consists of many microscopic crystals of iodoquinine sulphate (herapathite) embedded in a transparent nitrocellulose polymer film. The needle-like
Polaroid_(polarizer)
British astronomer (1790–1868)
the chemist and William Bird Herapath, the physician who discovered herapathite. In 1847 he published an early textbook on mathematical physics. Herapath's
John_Herapath
Reflecting only some colours of light
differing polarizations.[dubious – discuss] In some materials, such as herapathite (iodoquinine sulfate) or Polaroid sheets, the effect is not strongly
Dichroism
British astronomer and mathematician (1781–1868)
Polaroid film was inspired by the account of the optical properties of herapathite that he encountered in Brewster's book The Kaleidoscope, Its History
David_Brewster
Australian photographer and writer
Weight's great-grandfather was William Bird Herapath was the inventor of Herapathite, the crystals that became the basis of polaroid lenses used in spectacles
Greg_Weight
Surname list
William Bird Herapath (1820–1868), British surgeon/chemist who patented Herapathite Herapath's Journal, a 19th-century British railway journal edited by
Herapath
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