Home
Class 12
PHYSICS
Work function of metal X is equal to 3.5...

Work function of metal X is equal to `3.5 eV` and work function of material Y is equal to ionization energy of He+ ion in its first excited state. Light of same wavelength is incident on both X and Y. The maximum kinetic energy of photoelectrons emitted from X is twice that of photoelec- trons emitted from Y. Find the wavelength of incident light. `hc = 12400 eV Å`.

Text Solution

Verified by Experts

The correct Answer is:
`523 Å`
Promotional Banner

Topper's Solved these Questions

Similar Questions

Explore conceptually related problems

The work function of the metal A is equal to the ionization energy of the hydrogen atom in the first excited state. The work function of the metal B is equal to the ionization energy of He^+ ion in the second orbit. Photons of the same energy E are incident on both A and B the maximum kinetic energy of photoelectrons emitted from A is twice that of photoelectrons emitted from B. Value of E (in eV) is

The work function of a metal is 3.4 eV. A light of wavelength 3000Å is incident on it. The maximum kinetic energy of the ejected electron will be :

Light of wavelength 4000 Å is incident on a metal surface. The maximum kinetic energy of emitted photoelectron is 2 eV. What is the work function of the metal surface ?

Ligth of wavelength 4000 Å is incident on a metal plate whose work function is 2 eV . What is maximum kinetic enegy of emitted photoelectron ?

The work function of a mental is X eV when light of energy 2X eV is made to be incident on it then the maximum kinetic energy of emitted photo electron will be

Photons of energy 6 eV are incident on a metal surface whose work function is 4 eV . The minimum kinetic energy of the emitted photo - electrons will be

The work function of a metal is 2.5 eV. Light of wavelength 3600 Å is incident on this metal surface. The velocity of emitted photoelectrons will be

ARIHANT-WAVE PARTICLE DUALITY AND ATOMIC PHYSICS-All Questions
  1. A laser beam of wavelength lambda(1) = 5 xx 10^(– 7) m strikes normall...

    Text Solution

    |

  2. When photons of wavelength lambda(1) = 2920 Å strike the surface of me...

    Text Solution

    |

  3. Work function of metal X is equal to 3.5 eV and work function of mater...

    Text Solution

    |

  4. A particle of mass m is allowed to fall freely under gravity on an ela...

    Text Solution

    |

  5. A microscope can make you “see” something as small as the wavelength o...

    Text Solution

    |

  6. Electrons originally at rest are accelerated through a potential diffe...

    Text Solution

    |

  7. Calculate the ratio of de-Broglie wavelength of molecules of hydrogen ...

    Text Solution

    |

  8. Calculate de-Broglie wavelength of hydrogen molecules (H(2)) present i...

    Text Solution

    |

  9. In a nuclear physics experiment, electrons are to be accelerated so as...

    Text Solution

    |

  10. A parallel beam of monochromatic light of frequency v is incident on a...

    Text Solution

    |

  11. A horizontal beam of light in incident on a plane mirror inclined at 4...

    Text Solution

    |

  12. Intensity of sunlight on the surface of the earth is I = 1400 W//m^(2)...

    Text Solution

    |

  13. A perfectly absorbing solid sphere with a known fixed density, hovers ...

    Text Solution

    |

  14. Prove that Bohr’s condition for quantization of angular momentum in hy...

    Text Solution

    |

  15. The circumference of circular orbit of electron in a He^(+) ion is fiv...

    Text Solution

    |

  16. A gas of hydrogen - like atoms can absorb radiations of 698 eV. Conseq...

    Text Solution

    |

  17. A small particle of mass m moves in such a way that the potential ener...

    Text Solution

    |

  18. Hydrogen like atoms (atomic number = Z) in a sample are in excited sta...

    Text Solution

    |

  19. A mu – meson (charge = – e, mass= 208 m(e)) moves in a circular orbit ...

    Text Solution

    |

  20. A hydrogen like atom (atomic number = Z) is in higher excited state of...

    Text Solution

    |