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Answer the following question, which help you understand the difference between Thomson’s model and Rutherford’s model better. In which model is it completely wrong to ignore

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प्रश्न

Answer the following question, which help you understand the difference between Thomson’s model and Rutherford’s model better.

In which model is it completely wrong to ignore multiple scattering for the calculation of average angle of scattering of α-particles by a thin foil?

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उत्तर

Thomson’s model

It is wrong to ignore multiple scattering in Thomson’s model for the calculation of the average angle of scattering of α­−particles by a thin foil. This is because a single collision causes a very little deflection in this model. Hence, the observed average scattering angle can be explained only by considering multiple scattering.

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अध्याय 12: Atoms - Exercise [पृष्ठ ४३६]

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एनसीईआरटी Physics Part I and II [English] Class 12
अध्याय 12 Atoms
Exercise | Q 12.11 (d) | पृष्ठ ४३६

संबंधित प्रश्न

Using Rutherford's model of the atom, derive the expression for the total energy of the electron in hydrogen atom. What is the significance of total negative energy possessed by the electron?


In the ground state of ______ electrons are in stable equilibrium, while in ______ electrons always experience a net force.


Answer the following question, which help you understand the difference between Thomson’s model and Rutherford’s model better.

Is the average angle of deflection of α­-particles by a thin gold foil predicted by Thomson’s model much less, about the same, or much greater than that predicted by Rutherford’s model?


Answer the following question, which help you understand the difference between Thomson’s model and Rutherford’s model better.

Keeping other factors fixed, it is found experimentally that for small thickness t, the number of α-particles scattered at moderate angles is proportional to t. What clue does this linear dependence on t provide?


In a Geiger-Marsden experiment, calculate the distance of closest approach to the nucleus of Z = 80, when a α-particle of 8Mev energy impinges on it before it comes momentarily to rest and reverses its direction.

How will the distance of closest approach be affected when the kinetic energy of the α-particle is doubles?


Answer the following question.
Explain briefly how Rutherford scattering of α-particle by a target nucleus can provide information on the size of the nucleus.


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During Rutherford’s gold foil experiment, it was observed that most of the α-particles did not deflect. However, some showed a deflection of 180°. 

What hypothesis was made to justify the deflection of α-particle by 180°?


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