Question: Light emitted by element (X) passes through a diffraction grating that has 1200 slits (/ mathrm{mm}). The interference pattern is observed on a screen (75.0

Light emitted by element $X$ passes through a diffraction grating that has 1200 slits $/ \mathrm{mm}$. The interference pattern is observed on a screen $75.0 \mathrm{~cm}$ behind the grating. First-order maxima are observed at distances of $56.2 \mathrm{~cm}, 65.9 \mathrm{~cm}$, and $93.5 \mathrm{~cm}$ from the central maximum. What are the wavelengths of light emitted by element $\mathrm{X}$ ?

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