Question

How fluorascent lamp helps to identify fake notes?

Answer 1

UV counterfeit currency detectors are used to detect special inks in the bills that only appear under the proper wavelength of UV light.

Successfully implementing UV security features into a national currency  is a two-fold process. The first step entails printing currency with ultraviolet inks. UV inks specified by the U.S. Bureau of Printing and Engraving must utilize UV-fluorescent phosphors which can produce a reaction when placed under ultraviolet light, while at the same time remaining hidden (or, “covert”) when viewed under normal lighting conditions. When exposed to UV light, the UV ink changes its appearance and becomes visible to the human eye. This means that in normal lighting, the UV ink-printed security designs are not visible.  The appearance changes drastically when placed directly under a UV light, producing a fluorescent appearance that is easily visible to the human eye. and this is how fluorescent lamps work.

Answer 2

Hints and tips on how to spot a counterfeit note. ... What to look for on the new polymer £10 note ... To help identify genuine banknotes, the Bank of England provide a ... A good quality ultra violet (UV) lamp that emits light at ...