Assertion: signal's noise | /r/CreatedBy | light source instability
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Source sentences:
text: Flicker noise, caused by light source instability, vibration, sample cell positioning errors, sample turbulence, light scattering by suspended particles, dust, bubbles, etc., is directly proportional to the light intensity (and is usually pink rather than white ), so the flicker S/N ratio is not decreased by increasing the slit width.