A beam of fast moving α-particles was directed towards a thin film of gold. The parts A', B' and C' of the transmitted and reflected beams corresponding to the incident parts A, B and C of the beam are shown in the adjoining diagra. The number of α-particles in
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This question relates to Rutherford's alpha particle scattering experiment. When alpha particles hit a gold foil:
- Most particles pass through with little deflection (region C')
- A small fraction are deflected at large angles (region B')
- A very few bounce straight back (region A')
The number of particles is maximum where deflection is minimum, and minimum where deflection is maximum.
Therefore, the number of α-particles will be maximum in C' (least deflection) and minimum in A' (maximum deflection).
Final answer: A' will be minimum and in C' maximum