Home
Class 12
PHYSICS
(a) State Bohr's postulate to define st...

(a) State Bohr's postulate to define stable orbits in hydrogen atom. How does de Broglie's hypothesis explain the stability of these orbits ?
(b) A hydrogen atom initially in the ground state absorbs a photon which excites it to then n = 4 level . Estimate the frequeny of the photon.

Promotional Banner

Topper's Solved these Questions

  • ATOMS

    MODERN PUBLICATION|Exercise Revision Exercise (Long Answer )|5 Videos

  • ATOMS

    MODERN PUBLICATION|Exercise Revision Exercise (Numerical Problems )|23 Videos

  • ATOMS

    MODERN PUBLICATION|Exercise Revision Exercise (Fill in the blanks )|8 Videos

  • ALTERNATING CURRENT

    MODERN PUBLICATION|Exercise CHAPTER PRACTICE TEST|16 Videos

  • CURRENT ELECTRICITY

    MODERN PUBLICATION|Exercise Chapter Practice Test|15 Videos

Similar Questions

Explore conceptually related problems

A hydrogen atom initially in the ground level absorbs a photon , which excites it to then n=4 level. Determine the wavelength and frequency of photon.

A hydrogen atom initially in the ground level absorbs a photon, Which excites it to n=4 level. Determine the wavelength and frequency of photon.

A hydrogen atom initially in the ground level absorbs a photon and is excited to n=4 level then the wavelength of photon is

The speed of an electron in the orbit of hydrogen atom in the ground state is

A photon of energy 12.09 eV is completely absorbed by a hydrogen atom initially in the ground state. The quantum number of excited state is

MODERN PUBLICATION-ATOMS -Revision Exercise (Short Answer )
  1. Hydrogen atom in third excited state de-excites to the first excited s...

    Text Solution

    |

  2. In Balmer series of hydrogen atom write - (i) the formula for calcul...

    Text Solution

    |

  3. The short weve length limit for the Lyman series of the hydrogen spect...

    Text Solution

    |

  4. Find out the wavelength of the electron orbiting in the ground state...

    Text Solution

    |

  5. Show the Halpha and Hbeta transitions of hydrogen atom in an energy le...

    Text Solution

    |

  6. State the three postulates of Bohr's theory of hydrogen atom.

    Text Solution

    |

  7. A 12.5 eV electron beam is used to excite a gaseous hydrogen atom at r...

    Text Solution

    |

  8. State Bohr's quantization condition of angular momentum. Calculate the...

    Text Solution

    |

  9. Calculate the orbital period of the electron in the first excited stat...

    Text Solution

    |

  10. According to second postulate of bohr model, the agnular momentum (Ln)...

    Text Solution

    |

  11. Give the expression for velocity of an electron in the n^(th) orbit. E...

    Text Solution

    |

  12. (a) Using de Broglie's hypothesis, explain with the help of a suitable...

    Text Solution

    |

  13. (a) State Bohr's postulate to define stable orbits in hydrogen atom...

    Text Solution

    |

  14. The grond state energy of hydrogen atom is 13.6 eV. If an electron m...

    Text Solution

    |

  15. The radii of Bohr's orbit are directly proportional to

    Text Solution

    |

  16. Using Bohr's postulate, derive the expression for the orbital period ...

    Text Solution

    |

  17. Calculate the shortest and longest wavelength in Lyman series of hydro...

    Text Solution

    |

  18. The first member of the Balmer series of hydrogen atom has wavelength ...

    Text Solution

    |

  19. Calculate the wavelength of the first line in the Balmer series of hy...

    Text Solution

    |

  20. An electron in a hydrogen atom jumps from n = 5 energy level to n = 1 ...

    Text Solution

    |