Features of highlighter
The highlighter has a fluorescent agent. When it encounters ultraviolet rays (sunlight, fluorescent lamps, mercury lamps are more), it will produce a fluorescent effect and emit white light, which makes the color look dazzling fluorescent. The fluorescence of fluorescent pens is different from the fluorescence principle of our watches and fluorescent sticks. The fluorescent sticks have a radioactive reaction inside, and the generated rays excite the peripheral phosphors to emit light, so they can emit light at night without any ultraviolet rays. The highlighter will only fluoresce when there is ultraviolet light. This can be seen very clearly by placing the handwriting of the highlighter close to the mosquito trap or the currency detector.
