Question: Measuring Refractive Index a thin alit illuminated by light of frequency f produces its first dark band at 38.2 in air. When the entire

Measuring Refractive Index a thin alit illuminated by light of frequency f produces its first dark band at ± 38.2° in air. When the entire apparatus (alit, screen, and space in between) is immersed in an unknown transparent liquid, the slit's first dark bands occur instead at ± 17.4°. Find the refractive index of the liquid.

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