Is the strength of blacklight Flourescence proportionate to the strength of the source, or is there a threshold?
Say I have a black light hooked up to a dimmer switch and a material that fluoresces under black light. As I gradually increase the 'brightness' of the black light, can I expect the fluorescent material to fluoresce gradually brighter, or is there a definite 'threshold' below which there is no fluorescence?
Will the same hold true for IR-fluorescent materials and IR sources?
Thanks in advance!