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← ScienceWhich risk increases when a diffraction grating is stretched?
A)Destructive interference shifts wavelengths✓
B)Increased incident beam polarization
C)Grating period decreases linearly
D)Blazed wavelength becomes stabilized
💡 Explanation
Wavelength selection shifts where grating element spacing changes, so constructive interference patterns shift because constructive interference angles are altered. Therefore, specific wavelengths could experience destructive interference rather than the original pattern since spatial relationships are changed.
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