Anukruti posted an Question
July 24, 2020 • 04:20 am 30 points
  • IIT JAM
  • Geology (GG)

The refractive indices of a biaxial mineral are 1.2,1.4 and 1.5. 2v angle is ?

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    Sajan sarthak best-answer

    tulene University material

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    ok sir.i will analyse it tomorrow. thank u so much sir on helping in solving my queries.

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    Sajan sarthak Best Answer

    Find out by doing it diagramtically

    cropped3993952124463230157.jpg
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    take 1.5 as alpha as ellipsoid semi major axis infact here ellipse. the perpendicular to it 1.2 as semi minor axis then draw the ellipse. then find out at which line 2.8 that is (1.4+1.4) beta fits in by moving your scale. there will be two beta on both side they are the circular section so perpendicular to beta will be two optic axis just draw them and see the angles obtuse and acute.

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    as these are just numbers so you can multiply any integer to make the large in length like 2* 1.5 =3 ,2*1.2 = 2.4 , 1.4*2= 2.8

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