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Eye damage from a pocket laser is unlikely, but could be possible under certain conditions. Red laser pointers that are "properly labeled" in the mW range have not caused eye damage -- no retinal damage has been reported -- but there are very real concerns. One is pointers not manufactured to federal specifications. There are reports that green lasers, improperly imported to the U. The FDA regulates the devices and how they are classified and labeled.SEE VIDEO BY TOPIC: Here's How An LSD Trip Looks Like! (Realistic Replication)
SEE VIDEO BY TOPIC: Seeing Your True Self with the True MirrorContent:
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- The Best Mirrorless Camera
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- 25 Hilarious Shots of People Trying to Sell Mirrors
Why You’re the Ugliest Version of Yourself on FaceTime
Eye damage from a pocket laser is unlikely, but could be possible under certain conditions. Red laser pointers that are "properly labeled" in the mW range have not caused eye damage -- no retinal damage has been reported -- but there are very real concerns. One is pointers not manufactured to federal specifications. There are reports that green lasers, improperly imported to the U. The FDA regulates the devices and how they are classified and labeled.
A class 2 is "safer" than a class 3. Many laser pointers are in the range of 1 to 5 milliwatts mW , a subclass of 3 called 3A. A close reading of exposure limits indicate that a 5 mW laser could cause eye damage. Why even worry about 5 mW 5 thousandths of a watt , which is less than one percent of one percent of the power of a 60 Watt incandescent bulb?
First, the numbers are used differently. Light bulb wattage measures the power it uses. It only converts about 10 percent of that electrical power into light. In a laser, the power is a measure of the light output. Second, the light bulb gives light in all directions so you only see a small part of the whole. As you move away from the bulb, you see a quarter of the light every time the distance is doubled.
A laser gives light in one small beam. If it gets into the eye, you receive all the laser's energy, not just a fraction. Third, a light bulb gives off light at many different wavelengths different photon energies. A laser is a pure tone, only one wavelength.
The coherent light will be more damaging. The common red laser pointer is a diode laser, really just a special type of transistor, or diode. Because of the unique features of laser light, it is magnified by , times as it passes through the eye.
The light passes to the back part of the eye, the retina, which is where we perceive vision. The eye actually sees a small part of the electromagnetic spectrum that runs from short cosmic ray energies to long radiowaves. We see only from violet to red. Infrared IR and ultraviolet UV are just outside our ability to see. The eye is most sensitive to yellow-green light nm. At the same power, nm red light is only 3 percent as bright.
When determining safety limits for the laser pointer or in other areas, a value must be chosen. Above a certain number is illegal or dangerous, below is OK. In real life many factors contribute to something becoming harmful. Look at traffic laws. Seventy miles per hour may be legal while 71 earns you a ticket, yet it is not really more dangerous.
But mph is much riskier, and 50 mph may be dangerous if the road is covered with ice. So with laser pointers, different conditions determine when retinal damage will actually occur. In FDA-regulated pointers, the laser power limit is set at one-tenth the actual threshold of damage.
If a person sees a bright light, they will automatically blink, on the average in less than 0. This is referred to as the blink reflex, and it is considered when the limit is assigned for how much power will cause an eye injury. By the way, you shouldn't force a stare at a laser, just like you shouldn't stare at the sun or any bright light source.
Possible more potentially damaging -- although not to the eye -- is that a regular pointer laser can overwhelm the eye with light, typically called flash blindness.
If a person is walking a rocky path, operating machinery, a vehicle or aircraft, this temporary loss of vision could cause injury or disaster. At night, when the pupil is most open, the effects would bemagnified. Some basic rules with lasers: Never direct a beam onto another person, especially their face.
Do not shine it onto a mirror or mirror-like surface. Do not look at the beam through binoculars or a microscope. One last thing -- some government entities have banned or restricted laser pointers.
Some states and some cities have or have proposed age limits on the purchase or use of pointers. The United Kingdom bans the use of class 3A pointers. Laser pointers are high-tech tools, not toys. Newsletter Get smart. Sign up for our email newsletter. Already a subscriber? Sign in. See Subscription Options. Sign Up. This answer comes from Douglas A. He is also adjunct lecturer in the nuclear engineering department.
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Screen mirroring a phone, iPad or laptop to TV: How to push your phone to the big screen
Its advanced features help capture reliably great-looking images in all kinds of conditions, and its small size makes it easier to carry than most competitors. Although the auto modes are reliably great, the E-M10 III also has manual control knobs and buttons and a tilting touchscreen, which make this model one of the better-handling cameras in its class. Its built-in Wi-Fi lets you transfer images to your phone to share with your family, friends, and Instagram followers.
In Season 4 of Charlie Brooker's "Black Mirror," there's an episode called "Hang the DJ" where people are matched together, but their relationship is given an expiration date. The newly coupled pair can either choose to look at what their expiration is, or continue on oblivious until their digital "Coach" tells them their time is up. It's hailed as one of the more wholesome episodes, with a relatively happy ending. One viewer liked it so much, he has seemingly created a dating app based on the matchmaking method. I decided to take matters into my own hands and shake things up.
The Best Mirrorless Camera
In , practically everyone has a screen in their pockets at all times, but if you're in the comfort of your own home, you don't want to be limited to looking at photos and video on your phone's relatively small display. Screen mirroring is the perfect answer to this. The good news is that there are plenty of different ways you can mirror your screen to any modern TV. Unsure how to connect your phone, laptop or iPad to a TV? We've got you covered in our handy guide. You can thank us later. Top tip: Amazon makes its own HDMI cable and it's just as good as something you'll pay top dollar for.
Why You Hate Looking in the Mirror, and How to Accept the Person You See There
The first time a cat catches a glimpse of themselves in the mirror, they usually go absolutely bonkers! If your furry friend is one of those cats, feel free to place mirrors around your home wherever you please. But just why do most cats go so bananas when they see their reflection? Although it seems like we commonly hear about cats reacting the most violently to their reflections, other animals do it too. Dogs, birds, and even reptiles like lizards may react like wild animals when they catch their own reflection, either trying to play with their reflections or attack them.
Kind of a twisted thing, if you ask me. But look in the mirror I do, and often shake my head at what I see there. How harshly do you judge your own features? How much of your body from the neck up do you try to hide under a comb-over or makeup?
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Image: Cathryn Virginia. VICE Media makes a small commission on products linked in this article. Taking a good naked photo is harder than it looks, even if professionals Instagram influencers, sex workers, and Reddit models make it look easy.SEE VIDEO BY TOPIC: Why You Look Ugly In Pictures - It Is Your Cameras Fault!
Isn't technology grand? This presents everyone with the magnificent power to create wonderful photographs of their surroundings. We've trawled the web to find the very best in panoramic fails that are sure to give you a good giggle. We've all seen a fair few weird and wonderful dog breeds over the years, but this is a real corker. Imagine what mischief this pooch would get up to with all those paws.
25 Hilarious Shots of People Trying to Sell Mirrors