Radioactivity
Not long after the discovery of X-ray, Antoine Becquerel (1896), a professor of fzikës in Paris, began to study the fluorescent properties of substances. Suddenly, he found that if the photographic plates wrapped in black paper exposed to uranium compound, it will be tarnished even if they are not present cathode rays. Like X-rays, the rays from uranium compound had high energy and devijonirt not the magnet, but unlike X-rays, they were spontaneously generated. One of the students Becqerelit, Mane Curie, suggested that spontaneous emission or radiation particles called radioactivity. Consequently, any element that spontaneously emits radiation beam is.
Further research by Emma Rutherford discovered that the degradation or breakdown of radioactive substances produced three types of rays. Two types of rays shunned by metal plates laden with loads opposite. Alpha rays (a) consist of positively charged particles, thus deviating from the positive plates. Beta rays (B), or B particles are electrons and avoid negatively charged plates. The third type of radiation consists of high-energy beam called. 1. Like beam X-rays, y rays have not load and are not affected by external electric fields or magnetic.
