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extinction angle

n.
1.the angle from its axis that a crystal must be rotated before appearing maximally dark when viewed in polarized light

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    Idiom of the Day

    pay a king's ransom for (something)
    to pay a great deal of money for something
    My friend paid a king's ransom for his new entertainment system.



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    pseudonymous

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    My Account / Test History
    Invention
    Invention : geiger counter
    Year : 1908
    Inventor : hans geiger
    Country : germany.      .. More >>
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