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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Sajan sarthak
trichoric:- 3 colour 2.4 . isometric and isotopic will not have any inteference color. so Elliminated. as light will have same property in all directions. Isometric minerals cannot exhibit pleochroism. 3.Orthorhombic, monoclinic and triclinic crystals can show three and are trichroic. For example, hypersthene, with two optical axes, can have red, yellow or blue appearance when oriented in three different ways in three-dimensional space. both 1 and 3 can be answers