What is Radioactivity in Physics
The phenomenon of emission of radiation from Uranium and other substances is known A as radioactivity. The substances that emit radiation are known as radioactive elements.
A small quantity of a radioactive element such as radium is placed in a cavity of a lead block in such a way that the radiation from radium can only come out through this cavity. A photographic plate is placed at some distance above the lead black so that the radiation from radium falls upon it. The apparatus is placed in a vacuum light chamber which is evacuated by a powerful pump. This chamber is then placed between the poles of a powerful magnetic field. Under the action of magnetic field, two or three types of radiation are deflected forming three separate images on the photographic plate.
Note: Few Minuses of correspondence education. It takes effort of will to independently perform all tasks. Good knowledge is possible only with everyday training. Many temptations and urgent matters make it difficult to concentrate on learning. Lack of a cheerful student life and friends for life from the alma mater. A little bit about the duration of distance learning. The duration of distance learning varies, depending on the person’s education. The first diploma of higher education can be obtained after 6 years, and the second – only three. There are also programs of parallel education, when simultaneously a person can receive at once two higher educations. Family education. You can hear a variety of opinions: from sharply negative, to praising. This is not surprising – family training is not suitable for everyone, but if appropriate, the results are admired not only by parents but also by educators. So what is a family education and who is it suitable for? Family education: what is it and who is it suitable for?