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← ScienceWhich outcome occurs when infrared laser light encounters closely spaced parallel grooves?
A)Diffraction maxima exhibit chromatic dispersion✓
B)Total internal reflection maximizes transmission
C)Brewster's angle eliminates reflectivity
D)Raman scattering generates upconverted photons
💡 Explanation
Diffraction of laser light from the grating generates interference patterns. Because the geometry dictates interference maxima at angles dependent on wavelength, diffraction maxima will exhibit chromatic disperson towards longer wavelengths; therefore the grating separates wavelengths, rather than acting as a mirror/modifier.
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