why the rays deflected back during the Rutherford experiment
Answers
Answer:
A small fraction of the -particles came close to the nucleus of a gold atom as they passed through the foil. When this happened, the force of repulsion between the positively charged -particle and the nucleus deflected the -particle by a small angle.
Answer:
Explanation:
n 1899 Ernest Rutherford studied the absorption of radioactivity by thin sheets of metal foil and found two components: alpha (a) radiation, which is absorbed by a few thousandths of a centimeter of metal foil, and beta (b) radiation, which can pass through 100 times as much foil before it was absorbed. Shortly thereafter, a third form of radiation, named gamma (g) rays, was discovered that can penetrate as much as several centimeters of lead. The three kinds of radiation also differ in the way they are affected by electric and magnetic fields, as shown below.
(a) In her thesis, Marie Curie reported the drawing on the left which showed the effect of a magnetic field on the three forms of radioactivity. Alpha-particles were deflected more slowly than beta-particles, which suggested that alpha-particles were heavier than beta-particles. Gamma-rays were not affected by a magnetic field. (b) The effect of an electric field on the different forms of radioactivity shows that alpha-particles and beta-particles are both electrically charged, but they carry charges with opposite signs. Gamma-rays are not affected by an electric field and therefore have no electric charge.