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← ScienceWhich wavelength change arises from increased medium density in laser-induced breakdown spectroscopy?
A)Blueshift due to increased collisions✓
B)Redshift due to increased absorption
C)No shift, density unrelated parameter
D)Polarization changes dominate instead
💡 Explanation
A blueshift occurs because increased density leads to more frequent collisions; this collision broadening causes the emitted photons to have slightly higher energies, therefore shortening the wavelength rather than increasing it, due to absorption changes.
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