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The electric potential between a proton and an electron is given by V = V0 In `("r"/"r"_0)`, where r0 is a constant. Assume that Bohr atom model is applicable to potential, then a variation of radius of nth orbit rn with the principal quantum number n is
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Give the results of Rutherford alpha scattering experiment.
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Write down the postulates of Bohr atom model.
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What is meant by excitation energy?
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Write down the draw backs of the Bohr atom model.
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What is distance of closest approach?
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Define impact parameter.
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In an electron microscope, the electrons are accelerated by a voltage of 14 kV. If the voltage is changed to 224 kV, then the de Broglie wavelength associated with the electrons would
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Explain the J. J. Thomson experiment to determine the specific charge of an electron.
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Derive the energy expression for an eletron is the hydrogen atom using Bohr atom model.
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Discuss the spectral series of hydrogen atom.
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In the Bohr atom model, the frequency of transitions is given by the following expression
v = `"Rc" (1/"n"^2 - 1/"m"^2)`, where n < m
Consider the following transitions:
| Transitions | m → n |
| 1 | 3 → 2 |
| 2 | 2 → 1 |
| 3 | 3 → 1 |
Show that the frequency of these transitions obey sum rule (which is known as Ritz combination principle).
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- A hydrogen atom is excited by radiation of wavelength 97.5 nm. Find the principal quantum number of the excited state.
- Show that the total number of lines in emission spectrum is `("n"("n - 1"))/2`.
Compute the total number of possible lines in emission spectrum as given in(a).
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Write the expression for the de Broglie wavelength associated with a charged particle of charge q and mass m, when it is accelerated through a potential V.
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State de Broglie hypothesis.
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Why we do not see the wave properties of a baseball?
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A proton and an electron have the same kinetic energy. Which one has a greater de Broglie wavelength? Justify.
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Write the relationship of de Broglie wavelength λ associated with a particle of mass m in terms of its kinetic energy K.
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An electron and an alpha particle have the same kinetic energy. How are the de Broglie wavelengths associated with them related?
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What is Bremsstrahlung?
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