Question: Q. 5. (i) Draw a schematic arrangement of the Geiger-
Marsden experiment and describe it.
(ii) How did the scattering of $\alpha$-particle by a thin foil of gold provide an important way to determine an upper limit on the size of the nucleus ? Explain briefly.
R [OD 2009]
Show Answer
Solution:
Ans. (i) Try Yourself Similar Q. 2 (i), Long Answer Type Questions.
(ii) The alpha particles those are incident head-on with the gold nucleus experience a very large force of repulsion and undergo maximum deflection. Equating the kinetic energy of the incident alpha particle with the potential energy of the alpha particle and gold nucleus, the closest distance of approach can be calculated.
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CHAPTER 13
