UV banknote checking light: real 365nm for $4?
YraaGreetings to all who looked at the light. The review will focus, as you probably already guessed, on an ultra-cheap UV lamp with a wavelength of 365-380nm, which allows you…
Pocket ultraviolet laser: checking the cheese
Once I came across an article on the fluorescence of mineral and vegetable oils in ultraviolet light. Briefly: by the way an oil glows or does not glow under ultraviolet…