a) Is the optical axis of a birefringent crystal simply a line or an address in...

a) Is the optical axis of a birefringent crystal simply a line or an address in space?
Does it have direction and sense like an arrow?
b) Explain what the crystals are: trigonal, tetragonal, hexagonal, triclinic, monoclinic and orthorhombic.
c) Explain in detail what is fluorescence and phosphorescence.

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genius_generous answered 1 month ago

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