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In a sample of hydrogen-like atom all of...

In a sample of hydrogen-like atom all of which are in ground state, a photon beam containing photos of various energies is passed. In absorption spectrum, five dark lines, are observed. The number of bright lines in the emission spectrum will be (assume that all transitions takes place).

A

5

B

10

C

15

D

none of these

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The correct Answer is:
C
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MOTION-MODERN PHYSICS -1-EXERCISE-1
  1. The radius of Bohr's first orbit is a(0) . The electron in n^(th) orbi...

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  2. The ionisation potential of H-atom is 13.6 eV. The energy required to ...

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  3. In a sample of hydrogen-like atom all of which are in ground state, a ...

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  4. A neutron collies head-on with a stationary hydrogen atom in ground st...

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  5. The electron in a hydrogen atom make a transition from an excited stat...

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  6. An H atom in ground state is moving with initial kinetic energy K .It ...

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  7. An electron collides with a hydrogen atom in its ground state and exci...

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  8. An electron with kinetic energy 5eV is incident on a hydrogen atom in ...

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  9. An electron of energy 11.2 eV undergoes an inelastic collision with a...

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  10. The recoil speed of hydrogen atom after it emits a photon in going fro...

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  11. The recoil speed of a hydrogen atom after it emits a photon is going...

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  12. A neutron moving with speed a makes a heat on collision with a hydroge...

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  13. A hydrogen atom is in 5^("in") excited state. When the electron jumps ...

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  14. In a characteristic X-ray spectra of some atom superimposed on continu...

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  15. Which of the following wavelenght falls in X-rays region?

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  16. The penetration power of X-ray increases with the increases in its:

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  17. If the frequency of K(alpha), K(beta) and L(alpha) , X-ray lines of a...

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  18. In X-ray tube , when the accelerating voltage V is halved, the differe...

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  19. The voltage applied to an X-ray tube is 18 kV. The maximum mass of pho...

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  20. The wavelength of K(alpha) X-rays of two metals A and B are 4 // 1875 ...

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