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Good afternoon, dear students.

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I was wary of early hypotheses, hasty guesses, fantastic assumptions. I only trust experience. In 1895, in the last days of October, I gathered in my laboratory all the necessary materials and devices and started experiments.

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I used such devices as: a glass ball with two metal plates soldered inside, both plates were attached to the wire, the ends of the wires sticking out through the glass wall of the ball, a strong air pump, an induction coil.

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Realizing that faced with a new phenomenon, I began to carefully explore the mysterious rays. Opposite the tube I set the screen and to determine the strength of the radiation, placed between them different objects. Book Board, sheets of paper – they were transparent to the rays. I put a box with a set of weights under the beams. On the screen became visible from the shadows. Under the beam accidentally hit my hand. I froze in place. I saw my own arm bones moving. Bone tissue like metal was impervious to rays. My wife was the first to know about the outstanding discovery of x-rays.  With the help of X-rays I photographed Frau Bertha's hand . It was the first ever x-ray.

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The main place the use of these rays – medical institutions. A year after the discovery, x-rays were used to diagnose fractures. But the possibility of the rays was much wider. In medicine, a new area was formed – radiology. Modern medical equipment using x-rays examines any internal organs. In this case, the image can be seen not only on the film, but also on the monitor screen. X-rays are used not only in the diagnosis, but also in the treatment of certain diseases, such as cancer.

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Creating X-rays with a standard vacuum tube

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However, x-rays have negative qualities. If used incorrectly, it becomes dangerous to health. Neither I nor my contemporaries knew about it and worked without applying any precautions. Many physicists at the time received severe radiation burns. Only years later was determined the safe dose of irradiation and the means of protection.