The phenomenon of magnetism known to mankind for a long time.It got its name thanks to the city of magnetite, which is located in Asia Minor.That's where it was found a huge amount of iron ore.The earliest mention of the unique properties of the magnet we can find in the works of Titus Lucretius, who wrote about it in his poem "On the Nature of vesche" about the I century BC
Since ancient times, people have found the use of the unique properties of iron ore.One of the most common devices, the effect of which was based on the attraction of metal, steel compass.Now it is very difficult to imagine a variety of industries, which would not be used simple magnets and electromagnets.
Earth's magnetic field - an area around the planet, which protects it from the harmful effects of radioactive solar radiation.The occurrence of this field, scientists argue to this day.But most of them said that it came through the Earth's core.The center of the planet has a molten outer and inner solid component.By rotating the liquid part of the core moves, dressed electric particles move and form a so-called magnetic field.
Earth's magnetic field is also called the magnetosphere.The concept of "magnetism" - a comprehensive and global nature of the property.At the moment, it is impossible to create a fully complete theory of the solar and terrestrial gravity, but now science is trying in many ways to understand and it manages to give a rather convincing explanation of the various aspects of this complex phenomenon.
Recently, scientists and ordinary citizens is largely concerned with the issue that the Earth's magnetic field gradually weakens its influence.Scientifically it has been proven that in the past 170 years, the magnetic field has been steadily weakening.It makes you wonder, since it is a certain kind of shield that protects the Earth and wildlife from the terrible influence of the radiation of sunlight.The Earth's magnetosphere resists the flow of such particles, which fly toward the poles.All these flows are retained in the upper layer of the atmosphere at the poles, forming a beautiful phenomenon - the aurora borealis.
case where Earth's magnetic field will disappear or greatly diminish, all the things on the planet will be under the direct influence of cosmic and solar radiation.In turn, this will lead to radiation diseases and injuries of all living organisms.The consequence of this disaster will be terrible mutations or complete destruction.Much to our relief, such a development is unlikely.
paleomagnetology scientists were able to provide enough reliable evidence that a magnetic field is constantly fluctuating, and the period of these oscillations is different.They also make approximately curve oscillation field and found out that at the moment the field is in the pull-down position, and will go down a couple of thousand years.Then, it will again be amplified for 4 thousand years.The last maximum value of the magnetic field of attraction came in the beginning of this era.The reasons for this instability put forward a wide variety, but a specific theory in this regard does not exist.
has long been known that many magnetic fields have a negative impact on living organisms.For example, experiments made on animals have shown that an external magnetic field can delay the development, slow the growth of cells and even change the composition of blood.That is why magnetic storms lead to poor health meteodependent people.
safe for human Earth's magnetic field - a field with a value of voltage up to 700 Oe.It should be noted that it is not a proper magnetic field of the Earth, and on electromagnetic fields, which are generated during operation of any radio or electrical device.
physical side of the process is the influence of Earth's magnetic field on the person is still not entirely clear.But we found out that it works on plants: germination and further growth of seeds is directly dependent on their original orientation relative to the magnetic field.And it can change or speed up or slow down the development of the plant.It is possible that someday this property will be used in agriculture.
The magnetic field of the Earth - is the power of its attraction.In some places, it varies, but the average figure is 0.5 Oe.In some places (in the so-called magnetic anomalies) intensity increases to 2E.
