What should be the minimum thickness of a half-wave plate made of calc – McqOptions

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1.	What should be the minimum thickness of a half-wave plate made of calcite for the light of wavelength 5500 Å? The principal refractive indices are 1.652 and 1.488.
A.	1.234 μm
B.	1.676 μm
C.	1.956 μm
D.	2.165 μm
Answer» D.

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