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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Vaibhav jain
In an uniaxial mineral (+/-) as soon as light enters the crystal it splits into two rays viz. ordinary (O) and extraordinary (E). O ray and E ray lie in the same plane as that of the optic axis and the E ray vibrates parallel to this plane while O ray vibrates perpendicular to it.