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Answer the following question, which help you understand the difference between Thomson’s model and Rutherford’s model better. Is the probability of backward scattering

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प्रश्न

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

Is the probability of backward scattering (i.e., scattering of α-particles at angles greater than 90°) predicted by Thomson’s model much less, about the same, or much greater than that predicted by Rutherford’s model?

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उत्तर

Much less

The probability of scattering of α-particles at angles greater than 90° predicted by Thomson’s model is much less than that predicted by Rutherford’s model.

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पाठ 12: Atoms - Exercise [पृष्ठ ४३६]

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

संबंधित प्रश्‍न

With the help of a neat labelled diagram, describe the Geiger- Marsden experiment


The positively charged part of the atom possesses most of the mass in ______.


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?


Define the distance of closest approach. An α-particle of kinetic energy 'K' is bombarded on a thin gold foil. The distance of the closest approach is 'r'. What will be the distance of closest approach for an α-particle of double the kinetic energy?


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?


The model that best explains the results of Geiger-Marsden experiment is ______.


If the radius of second electron orbit in hydrogen atom be r then the radius of the third orbit will be ______.


For 7.7 Mev alpha particles scattering from aluminium (Z = 13), the distance of closest approach in a bead on collision is ______.

Useful data

`1/(4 pi ∈_0) = 8.99 xx 10^9` newton m2C-2; c = 1.60 × 10-19 C; leV = 1.60 × 10-19j.


Which one of the following statements does not hold good when two balls of masses m1 and m2 undergo elastic collision?


The radius of electron's second stationary orbit in Bohr's atom is R. The radius of 3rd orbit will be:-


The ratio active Nude 7N13 decays 6C13 through the emission of


Nucleolus of an atom of mass No. 24 and charge no. 11 consists of


The Bohr model for the H-atom relies on the Coulomb’s law of electrostatics. Coulomb’s law has not directly been verified for very short distances of the order of angstroms. Supposing Coulomb’s law between two opposite charge + q1, –q2 is modified to |F| = `(q_1q_2)/((4πε_0)) 1/r^2, r ≥ R_0 = (q_1q_2)/(4πε_0) 1/R_0^2 (R_0/r)^ε, r ≤ R_0` Calculate in such a case, the ground state energy of a H-atom, if ε = 0.1, R0 = 1Å.


Draw a graph showing the variation of the number of particles scattered (N) with the scattering angle θ in the Geiger-Marsden experiment. Why only a small fraction of the particles are scattered at θ > 90°?


The electron in a hydrogen atom is typically found at a distance of about 5.3 × 10−11 m from the nucleus which has a diameter of about 1.0 × 10−15 m. Assuming the hydrogen atom to be a sphere of radius 5.3 × 10−11 m, what fraction of its volume is occupied by the nucleus?


The shortest wavelength of the Brackett series of a hydrogen like atom of atomic number Z is same as the shortest wavelength of the Balmer series of hydrogen atom, then the value of Z is ______.


Differentiate between the 'distance of the closest approach' and the 'impact parameter.'


Determine the distance of the closest approach when an alpha particle of kinetic energy 3.95 MeV approaches a nucleus of Z = 79, stops and reverses its directions.


When alpha particles are sent through a thin gold foil, most of them go straight through the foil, because ______.


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