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← ScienceWhich material property limits efficiency when focusing pulsed lasers?
A)Two-photon absorption reduces output
B)Fresnel reflection redirects pulse energy
C)Chromatic dispersion broadens focal points✓
D)Raman scattering weakens pulse intensity
💡 Explanation
Chromatic dispersion causes varying wavelengths to focus at different points, therefore pulse spreading reduces intensity rather than absorption or reflection, because focusing is impaired due to frequency-dependent refraction.
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