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 - Physics

Advertisements
Advertisements
Short Note

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?

Advertisements

Solution

Scattering is mainly due to single collisions. The chances of a single collision increase linearly with the number of target atoms. Since the number of target atoms increases with an increase in thickness, the collision probability depends linearly on the thickness of the target.

  Is there an error in this question or solution?
Chapter 12: Atoms - Exercise [Page 436]

APPEARS IN

NCERT Physics Class 12
Chapter 12 Atoms
Exercise | Q 12.11 (c) | Page 436
NCERT Physics Class 12
Chapter 12 Atoms
Exercise | Q 11.3 | Page 436

RELATED QUESTIONS

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


Thorium 90Th232 is disintegrated into lead 82Pb200. Find the number of α and β particles emitted in disintegration.


The size of the atom in Thomson’s model is ____________ the atomic size in Rutherford’s model.


An atom has a nearly continuous mass distribution in a ____________ but has a highly non-uniform mass distribution in ____________.
(Thomson’s model/Rutherford’s model)


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.

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?


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?


Write two important limitations of Rutherford's nuclear model of the atom.


The total energy of an electron in the ground state of the hydrogen atom is -13·6 eV. Its total energy, when a hydrogen atom is in the first excited state, is: 


Answer the following question.
A charged particle q is moving in the presence of a magnetic field B which is inclined to an angle 30° with the direction of the motion of the particle. Draw the trajectory followed by the particle in the presence of the field and explain how the particle describes this path.


In Geiger-Marsden experiment prediction was that ______.


The first line of Balmer series (Hα) in the spectrum of hydrogen is obtained when an electron of hydrogen atom goes from ______.


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


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


An automobile moves on a road with a speed of 54 km h−1. The radius of its wheels is 0.45 m and the moment of inertia of the wheel about its axis of rotation is 3 kg m2. If the vehicle is brought to rest in l 5s, the magnitude of average torque transmitted by its brakes to the wheel is:


A radioactive nucleus (initial mass number A and atomic number Z) emits 3 α- particles and 2 positrons. The ratio of the number of neutrons to that of protons in the final nucleus will be:


Plutonium decays with half of 24000 years. If plutonium is store for 72000 yrs. The fraction of .its that remain:-


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


An alpha particle has


In 88 Ra226 nucleus, there are


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


The ratio of minimum to maxm wavelength in ballmer series is:-


Would the Bohr formula for the H-atom remain unchanged if proton had a charge (+4/3)e and electron a charge (−3/4)e, where e = 1.6 × 10–19C. Give reasons for your answer.


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.


The energy levels of a certain atom for first, second and third levels are E, 4E/3 and 2E, respectively. A photon of wavelength λ is emitted for a transition 3 `→` 1. What will be the wavelength of emission for transition 2 `→` 1?


According to Bohr model, magnetic field at centre (at the nucleus) of a hydrogen atom due to motion of electron in the ninth orbit is proportional to:


If λa, λb and λc represent the Kα, Kβ and Lα transition wavelengths in a hydrogen atom, respectively. Then which of the following is correct?


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 ______.


Choose the correct option from the following options given below:


An alpha nucleus of energy `1/2`mv2 bombards a heavy nuclear target of charge Ze. Then the distance of closest approach for the alpha nucleus will be proportional to ______.

  1. v2
  2. `1/"m"`
  3. `1/"v"^2`
  4. `1/"Ze"`

In the Rutherford experiment, α-particles are scattered from a nucleus as shown. Out of the four paths, which path is not possible? 


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


Share
Notifications



      Forgot password?
Use app×