Tag: miscellaneous

Our planet is about 1 / 3 covered with water. Can not imagine life without water, but at the same time at the moment water spaces are among the most unexplored on earth. According to Rick Yune, who has experience with these questions. Oceans is fraught with a lot of interesting things. Seamounts, hidden from human eyes, larger than the planet's highest mountain Mount Everest, the gorges in width and depth greater than the Grand Canyon and the inhabitants of the worst submarine, deep-sea world does not catch your eye man. Ocean depths so far not been studied that somewhere out there in the cold darkness could easily live aliens, and we did not have guessed. The deepest point of the ocean is the Mariana Trench, its depth is 11,022 meters.

Abyss always beckoning its mystery and people made quite a few attempts to dive into the darkness. For the first time in the Mariana Trench fell Jean Piccard and Don Walsh in the submersible Trieste. They have reached the bottom at depth of 10,912 feet. After surfacing, scientists announced that the abyss is really populated by living organisms. This impenetrable, seemingly uninhabitable darkness live squid. Their limbs cover the membrane similar to the skirt, above the eyes are the fins u distinctive ears.

All these bodies are covered with luminous fabric, called photophores. Due to these features clams rarely rise to the surface, and most surprising that they become invisible against the backdrop of the illuminated surface. The corpse of a monstrous squid Arhitevitsa weighing a quarter of a ton with 15 meter antennae found people close to Macquarie Island. Experts have determined that a giant monster is just a cub, and he did not die right now, could grow to several tens of meters larger than its current size. Twelve centimeter shark teeth Magelodon still found in the deep sea. It was believed that this shark, which grows an adult individual for more than 30 meters extinct as dinosaurs, but the facts tell a different story. Sailors often tell tales about the inhabitants of the underwater world, believe it or not our right, but scary animals living there, in the end may come to the surface and then we all know that so carefully concealed under tons of ocean water in complete darkness. Perhaps, nature itself has decided to protect us from these unseen creatures hiding them so deeply and perhaps not worth going to her defiance.

The large area of the lens surface, tends to give more and glare from the lamp and ceiling light, which complicates the visual perception of the observed object. Plus simple magnifying lens – light weight of 37 grams to 150 programs and low cost, with a very modest increase, which raises the question of the appropriateness of their use, such as dentistry in general, and those funds that are spent. To increase the demand for simple plastic and glass lenses of the "visor", some manufacturers install them on a central illuminator direct type. The whole structure is fixed on the head with a hoop. Caldwell Esselstyn Jr. describes an additional similar source. Available in the same simple lens mainly in order to motivate the user to use optical instruments as such. This allows the technician to instill an interest in optical instruments, professional level, on which he had heard, but fears and doubts about the necessity of their use, kept him from close acquaintance with them for various reasons. So professional optical instrument is a complex binocular magnifier (ocular), for example, and dentaskop operating microscope. The increase in the binocular loupe is in the range from 1.5 to 4-8 times.

In dentistry, more sophisticated use binocular magnifier glasses with an increase from 2 to 6 times. In order to overcome the shortcomings of simple single lens, you should strive to use the optical system of complex binocular loupe (eyepiece), such as optical system Galileo and Kepler system. The optical system Galileo. This type of binoculars "bulldog" each consists of several positive and negative enlightened optical lenses.