The Best UV Flashlights tested

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UV radiation exposure can damage the cornea, the outer protective coating of the eye. Photokeratitis is a painful inflammation of the eye caused by UV radiation-induced lesions on the cornea. Symptoms include a “sand-like” feeling in the eye last can last several days. Chronic exposures to short-term UV radiation can lead to the formation of cataracts.Get more news about High Power Uv Pen Light,you can vist our website!

Unlike most of the "Top 10 UV flashlight" lists you find on Google, we actually owned and reviewed hundreds of flashlights on our team. Many of those lists in Google are written by people who know nothing about flashlights! In fact, many of these people do not even own flashlights. How we can tell? They show utterly ridiculous flashlights and never share any useful measurements data. I'll do my absolute best to help you with real knowledge. Please ignore my non-native English, because I'm actually Dutch.. ; --)

WHAT IS A blacklight and how do you make one? This is the topic of a recent MacGyver episode in which he quickly creates an improvised blacklight to find hidden messages on a wall. You can watch the scene here---and a disclaimer, I am currently the Technical Consultant for the show. But still, there's lots a great science in this one little scene.

OK, it's not really a black light. It's better to call it what it is: ultraviolet light. Let's start with a quick overview of light. Of course, light is an electromagnetic wave (oscillating electric and magnetic fields), but in this case the frequency is the important aspect. For some narrow range of frequencies, the human eye can detect these waves---this is called the visible spectrum. The lower frequency waves are interpreted by our eyes as the color red, and the higher frequency would be violet.

Of course, you could break this spectrum of colors into seven parts: red, orange, yellow, green, blue, indigo, and violet. But what the heck is indigo? Really, you could break this into just three colors---red, green, blue---or a thousand colors if you prefer. I tell my students there are seven colors because that's how many Isaac Newton wanted there to be. Seven is a cool number, and back in Newton's day there were just seven regular moving objects in the sky: the Sun, Moon, Mars, Mercury, Jupiter, Venus, and Saturn. Fun fact: That's the same order as the days of the week that are named after these objects. Save that for a party (along with radioactive bananas).