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Which consequence results when analyzing birefringent minerals inside polarizing microscopes?

A)Mineral colours appear under crossed polarizers
B)Refractive indices remain seemingly unchanged
C)Beck lines are invisible within grains
D)Pleochroism diminishes strongly under observation

💡 Explanation

The phenomenon of birefringence splits light into two rays with differing refractive indices. Because Constructive Interference causes specific wavelengths (colors) to constructively interfere when recombined after passing through the mineral, a spectrum of colors appear. Therefore colours appear under crossed polars, depending on thickness and orientation, rather than uniform or diminished effects.

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