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← ScienceWhich electronic transition dominates when monochromatic light hits crystalline silicon?
A)Band-structure related indirect absorption✓
B)Auger recombination momentum conservation
C)Plasmon resonance energy conversion
D)Edge case Umklapp phonon scattering
💡 Explanation
Indirect absorption is more probable because the crystal momentum difference necessitates phonon participation. This preserves total crystal momentum via phonon emission or absorption due to the lattice structure, therefore indirect absorption dominates rather than direct band-to-band transitions.
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