Some things here are simplified for brevity's sake. If you'd like to know some more about some specific aspect of UV, just drop me a message or comment here, I'd love to have some feedback.

On a final note, I'd like to say that I consider UV flashlights a lot of fun to play around with and I'm not discouraging anyone to get one. Just keep in mind the precautions you need to take and always put safety first.

There are more groups such as UV-vacuum with even shorter wavelength but these are not encountered unless you're in a physics lab so I'll omit them.

To preface this: if you have any suspicion that you got hurt by a UV source, ALWAYS seek medical care, ASAP. Don't look for answers here, just go.

ultraviolet中文

Typology ring lights are stunning, seemingly levitating light fixtures with illumination reminiscent of the sun's corona during an eclipse.

VacuumUVregion

Basically, just behave like you're holding a gun. The responsibility yours. Now, how can you protect your eyes from these naughty photons?

Feature-rich single line, multi-line and TDI cameras in a range of resolutions with advanced CMOS sensor technology and GigE, Camera Link, ...

Near UVregion

Eyes are an extremely sensitive organ. Unlike the rest of the body there's no layer of dead cells to shield it from harm. That purpose is fulfilled by the eyelids. But even the blinking reflex can be too slow with lower wavelengths or higher intensity light.

uvlight是什么

202438 — Flashing white light: Booting. · Slow (10 second) pulsing white light: Normal operation. · Red-white-blank flashing light: No WiFi added. · Slow ...

This guide will walk you through the process of mounting a camera on a ring light, ensuring that you have a seamless and enhanced filming experience.

For UV-A, most prescription glasses already have a filter that blocks UV-A (but check to be sure). Otherwise, wear goggles made from UV-A-absorbing plastic, such as polycarbonate.

Far-UV region

UV-A overexposure causes irritation, tears and discomfort. I would compare it to having really tired eyes after a long day. With a little rest, it'll pass

VCC's flexible and rigid light pipes provide excellent optical appearance and easy installation, enabling solutions for the simplest to most complex designs ...

UV-B can cause what's known as "snow blindness", medically known as photokeratitis, which can have lasting effects. Good comparison is someone throwing sand in your eyes that you can't get out.

Polarization is the property of light or other electromagnetic radiation, which is primarily understood via studying the waves of the radiation. It was ...

Lighting the Path is empowering people with sustainable solutions to alleviate poverty through education to enable them to earn a living.

I've been seeing a lot of questions about UV and its effects on health. There's some conflicting info so I'll try to summarize everything here, feel free to correct/add things.

UV-C is the most severe, as the damage is very concentrated on your cornea. It's known as "welder's flash", a more serious version of photokeratitis. If the exposure was significant, it can lead to permanent eye damage and vision loss. The pain is like if someone was pushing you face-first through Sahara sand dunes scorched by midday sun. (I wasn't kidding when I said don't screw around with UV-C)

Near UVand farUVrange

UV-C possesses the highest energy per photon and is classified as ionizing radiation.It gets completely absorbed by the atmosphere and the only sources of UV-C are artificial. The logical assumption would be, that it causes even more dangerous effects than UV-B. However, the wavelength is so short that it cannot penetrate skin deep enough (mostly) and gets absorbed by our dead skin cells on the surface, basically cooking them. It is painless (for some time) and smells like fried bacon. Ask me how I know. UV-C is the one most commonly used to sterilize surfaces, as it very effectively kills everything that it can reach. Note that the layer of dead skin is not uniform, so the risk of DNA damage is still there.

It is important to note that the energy of photons increases as the wavelength shortens. Therefore, the closer to zero you are in nm, the higher the ability of the photon to induce chemical reactions.

For UV-B, investing into some quality goggles specifically designed for UV-B is a good idea. Trust me, your eyesight is much more valuable than cheapo fake UV goggles from amazon.

uvlight中文

UV (Ultraviolet) is a region of light spectrum whose wavelength is shorter than that of visible light (blue and violet part) but longer than X-rays. UV is generally divided into 3 groups:

At Earth's surface, we mostly encounter UV-A which is able to penetrate Earth's atmosphere all the way down. The energy of these photons is still insufficient to cause significant chemical reactions and that's why it's the least harmful. However, it can still cause indirect damage, such as depleting Vitamin A and producing reactive chemical species, so caution still needs to be taken.

20141126 — Vision SLR was powered by the AMG 5.5 litre V8 engine supercharged with a mechanical compressor which deliver 557 HP and 720 Nm at 4,000 rpm, ...

UV light

This begs a question: what if you're a dumbass and forgot to wear goggles, what is the damage? Contrary to popular belief, UV damage your retina is not as severe, as it usually can't penetrate that deep. That honor would go to infrared, where your eye is fine until you hear a pop and suddenly you can't see (added drama but the point stands). The UV damage is very focused on cornea and lens, as these strongly absorb UV photons.

As for UV-C... just don't play with it. It has no inherent advantages over the previous 2 in terms of goofing around and is legitimately dangerous for you and everyone around you. Also, unless the UV-C is produced by quartz mercury bulbs, you'll pay dearly for the LEDs. Just leave it alone.

Section 50.2 Light as Electromagnetic Waves. ·. Young's double-slit experiment demonstrates that light is a wave since light forms interference expected ...

UV-B is where things are getting really dangerous. With higher energy, these can penetrate the dead skin layer and cause double-strand breaks in DNA in your skin. In better cases, the only consequence is a sunburn, in worse it's cancer. Fortunately, most of UV-B gets absorbed by the ozone layer and only a very small percentage actually makes it to surface.

Xprite offers effective strobe emergency lighting systems for police, emergency vehicles & more that needs to be clearly visible during bright conditions.