Surmani Baxla posted an Question
July 28, 2020 • 20:02 pm 5 points
  • IIT JAM
  • Geology (GG)

Why the uniaxial minerals basal section behave as isotropical minerals?

why the uniaxial minerals basal section behave as isotropical minerals?

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    Ankita sahoo

    and the Rays reach the mineral in the form of orthoscopic illumination so the rays are perpendicular to the surface

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    Ankita sahoo best-answer

    Because the basal section of uniaxial mineral is circular and is perpendicular to the optic axis so the light that pass through the crystal doesn't get splitted up into e ray and w ray so only w ray is there hence it behaves as isotropic

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    Sajan sarthak best-answer

    Basal section of uniaxial is perpendicular to optical axis so the light from below travels through the crystal parallel to optic axis ...so it never splits and behave as if isotropic.

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    but optic axis is a direction along which there is no double refraction and if you say that the light passes parallel to the optic axis then the section perpendicular to basal section should also behave as isotropically mineral

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    section perpendicular to basal section if placed on stage then light will hit optic axis at 90 degree ...

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