Basically, these sunglasses are defined as an ophthalmologic medical article made of frames and lenses, meant to diminish the amount of sunlight; however, they do not accomplish any sort of optical correction. Their main goal is to protect the wearer against excessive sunlight.
There are many instances that we pay exaggerated amounts of money for the name of the brand that made the sunglasses. As a rule, though, cheap or very cheap sunglasses are of lower quality and that happens primarily because a popular brand can’t afford to have its image sullied by selling low quality products. Even if sunglasses may seem better than nothing at all, the truth is far from that: interposing colored lenses between the eye and sunlight determines the physiological dilatation of the pupil. If the lens does not offer a sufficient protection, the fact is that more light enters the eye, including ultraviolet and infrared rays, which are harmful, through the dilated pupil.
Glasses, no matter their type, should also fit your physiognomy and be comfortable. In many cases, fashionable or trendy sunglasses may not match the physiognomy of the wearer, conferring to him/her a rather comical look. Even if sunglasses do protect 100% against UV, they cannot dampen the brightness of a water surface or of a road while driving.
Which is the best color for sunglasses, green, brown or yellow lenses? Green lenses are the most effective in absorbing UV and IR radiation, but they make violet, blue, orange and red hard to distinguish. Brown lenses absorb almost all UV radiation, and can be used in a moderately warm to cold environment, as they create a sensation of warm environment. Yellow lenses absorb UV rays, violet and blue light, and are preferred when hunting and driving in foggy conditions, but they are not useful against excessive light. Other colors (orange, purple, mauve) have no protective qualities but can be used for their trendiness factor nonetheless.
Sunglasess Info
Kinds of Victims
In any untoward incidents, whether man-made or natural, there will always be victims in it. here I will describe you the different emotional status of surviving victims in various bad incidents. (injuries are non-relevant in this observation) these are all my observations and all are still undocumented data but all these mirror what happens in real life. Reading and understanding is the key here!
1. composed victim = these victims tend to be calm and responsive to any question. they are generally found in every bad incidents.
2. shocked victim = these victims are unresponsive and stare blankly. also found in various bad incidents
3. hysterical victim = these victims are screaming and uncontrolled. unless subdued, they can inflict injury to other and themselves. found in violent crimes (always the survivor)
4. aggressive victim = these victims are violent and will hurt anyone(especially their attackers) unless subdued. found in crimes
5. vigilant victim = these victims have taken the law in their hands and will do anything to criminals. found in crimes
6. vindictive victim = these victims have taken up themselves to axe their attackers right away. found in violent crimes (survivors of those crimes)
7. silent victim = these victim will never speak up of what happened to them. found in crimes of physical, sexual and financial abuse
8. deranged victims = an upgrade of silent victim. suffering so much, their minds snap and became nutcases. found in crimes of physical, sexual and financial abuse.
9. twisted victims = an odd variety of silent victims. their morals become twisted that they tend to become criminals or mental cases but they are still sane. an example is a rape victim becoming a sex maniac or a "submissive" girl
10. time bomb victims = victims that have forgotten what has happened to them, only to have an outburst when exposed to a right trigger. outburst ranged from bouts of rage and insanity to total insanity
11. amnesiac victims = victims that have forgotten what has happened to them. they will remember parts of it in due time
Top 3 Weird Tongues!
Basically, tongue is an organ specific to the vertebrates. And they can do a lot of things with their tongues. So, here we go guys! Check this out...
1. A blue whale weighing 60-70 tons (and the largest blue whales can double this weight) has a 3 tons tongue. It is by far the largest tongue in the animal world. And the whale tongue is not large because of the overall size of the animal; right whales have extremely oversized tongues for their bodies, because they use their tongues like scoops while filtering the food in their huge mouths. 50 people could stand on the tongue of a blue whale.
2. The most famous tongue of the animal world is that of the chameleon. It is the longest in the world, comparing with the body length – in most species it is as long as the body and tail together. The tongue is launched and put back in a fraction of a second (0.04 s the launch (!), 0.5 s the put back). No wonder a chameleon can catch 4 flies in 3 seconds...
The tongue is like a long tube finished in a sticky bulb, due to the mucus secreted by glands located in its tip. The resting tongue is folded like an accordion around a bone called Processus entoglossus. For stretching the tongue during the hunt, the animal must relax longitudinal muscles that act like a spring.
3. But the technique of the chameleon is not specific to it. Exactly the same method of catching the prey is employed by a group of salamanders from the Americas, belonging to the Plethodontidae family. Species of 6 cm (2.4 in) have 5 cm (2 in) long tongues, the longest in the world of the amphibians.
Moreover, the giant palm salamander of Central America (Bolitoglossa dofleini) shoots out its tongue with the fastest speed developed by any known muscle in the vertebrates. The species can shoot out its tongue at 18,000 watts of power per muscular kilogram.
Bolitoglossa extends its tongue (which measures more than half of its body length) in about 7 milliseconds, 50 times faster than an eye blink.
The fact that the tongue is propelled outward much faster than by sheer muscle contraction shows that there must be an unknown elastic tissue connected to the salamander’s tongue, which stores up the energy amounts required by the explosive projection. The trajectory is sustained by cartilages integrated in the structure of the tongue. The process can be compared to the stretching and shooting of a rubber band: the recoil occurs faster than the act of releasing a rubber band pulled taut: the amount of energy doesn’t change; it’s just released faster.
7 Things About Lightning!
First, let's see what you did know about lightning. You probably know that it's an atmospheric discharge of electricity, occurring during rain storms. You're right. Now let's see if you also knew this:
1 - Lightning can form without rain storms.
Yes, it's true. Lightning can also occur during volcanic eruptions or dust storms, and doesn't really require massive cloud formations. Lightning has been observed striking the Apollo 12 soon after takeoff, and was even recorded striking soon after thermonuclear explosions. Some of the largest volcanic eruptions can trigger lightning, due to the gases and solid material they eject high into the atmosphere.
2 - Lightning can form on other planets
While it's true that it cannot form in the vacuum of space, requiring the electrical breakdown of gas, lightning has been spotted in the atmospheres of planets like Venus and Jupiter. On the gas giant, it can be 100 times more powerful, though 15 times less frequent, than on Earth.
3 - Lightning can and does strike the same place twice
In fact, lightning favors certain
spots, particularly high locations, like trees and buildings. The Empire State Building is struck by lightning on average 23 times each year, and was once struck 8 times in 24 minutes. Actually, most lightning strikes are made up of multiple individual strokes, meaning that what we see as a pulsating lightning actually consists of three or four different strokes following the same pathway.
4 - Lightning can strike from ground to the clouds
Also true. Called positive lightning, this type makes up less than 5% of all lightning. It forms when cloud tops become positively charged and the ground is negatively charged. When the tension is high enough, electrons from the ground will "climb" to the top of the cloud, forming an inverted lightning. They usually carry about ten times as much current as a bolt of negative lightning, the "normal" one.
5 - Lightning can appear as a sphere
There are many historical accounts of spherical lightnings, or "ball lightnings". A ball lightning has the strange tendency to float (or hover) in the air and take on a ball-like appearance. Many witnesses reported them as being red to yellow in color, sometimes transparent, and some containing radial filaments or sparks. Other colors, such as blue or white occur as well. Recent laboratory experiments are just beginning to shed light on the nature of ball lightning, a phenomenon that has baffled scientists for centuries.
6 - What is the thunder?
The thunder is the noise heard after the lightning occurred. It's actually an explosion of the air molecules in the discharge channel, a rapid expansion caused by the electrical discharge. The rolling and gradually dissipating rumble of thunder is caused by the time delay of sound coming from different portions of a long stroke.
7 - Can a lightning strike out of the blue?
Yes, a lightning can really strike without a thunderstorm being present in the area. This is not the type of lightning previously mentioned, it's actually a weather phenomenon that scientists dubbed as ''bolt from the blue'' or ''dry lightning'' because it falls from clear, blue skies.
