Anukruti Asked a Question
November 12, 2020 9:26 pmpts 30 pts
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  • Rahul kumar thankyou
    Answer: 90 degrees Any anisotropic mineral appear extinct four time during a 360° rotation. If a mineral is extinct at 30° then again after 90° rotation, the mineral will appear e...
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  • Sajan sarthak Best Answer
    Extinction is angle measured when both the polariser are crossed. 90 degree from the first Extinction means the reading on the stage which is aligned to cleavage at 120 degree .
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