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← ScienceWhich outcome occurs when imperfections alter the diffraction grating's periodicity?
A)Spurious side peaks form✓
B)Overall intensity improves sharply
C)Wavelength resolution increases linearly
D)Grating reflectivity reduces drastically
💡 Explanation
Spurious side peaks appear because non-uniform groove spacing causes constructive interference at unintended angles, which shifts the original wavelengths slightly. Therefore, extra peaks form, rather than intensified intensity, due to unwanted interference patterns.
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