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← ScienceWhich mechanism causes increased fringe visibility in Fabry-Pérot interferometers?
A)Increased mirror reflectivity✓
B)Decreased mirror flatness
C)Wider source bandwidth
D)Reduced input beam intensity
💡 Explanation
Increased reflectivity sharpens the peaks due to increased resonant transmission via constructive interference, because of many overlapping beams; therefore fringe contrast increases, rather than decreases that would happen from loss due transmission losses or imperfection.
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