Turn your smartphone into a blacklight using this unique trick

How do blacklight works and can you turn your smartphone into a detective tool?

What is a black light? A black light is a bulb that emits a purplish glow. What you cannot see is the ultraviolet light. The human eyes can see visible light in a spectrum ranging from red, orange, yellow, green blue and violet.

Convert your smartphone to blacklight

Above purple is called ultraviolet. This is also the reason why we are getting sunburns or sun tans.

To simulate an ultraviolet light without having a sunburn, is to use your flash light on your mobile phone.

All you need are tapes, blue and purple pentel pens and your smart phone with flash. Then follow the instruction on the video.

After you convert your mobile phone into a black light. Please don’t use to check if there are some extraordinary marking on the bed of a hotel room or it would ruin your holiday break.

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