In 1899, Rutherford and his colleagues experimentally discovered that radioactive radiation has a complex composition. They used a special installation to study radioactive radiation. A grain of radium was placed at the bottom of a narrow channel in a thick-walled lead vessel. The output beam of radioactive radiation of radium was acted upon by a strong magnetic field. The magnetic induction lines were perpendicular to the outgoing beam. A photographic plate was located opposite the channel, on which radioactive radiation was directed. The entire setup was placed under vacuum.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.