Home
Class 12
PHYSICS
The kinetic energy of most energetic ele...

The kinetic energy of most energetic electrons emitted from a metallic surface is doubled when the wavelength `lamda` of the incident radiation is changed from 400 nm to 310 nm. The work function of the metal is

Text Solution

Verified by Experts

The correct Answer is:
2.2
Promotional Banner

Topper's Solved these Questions

  • Current Electricity

    CENGAGE PHYSICS|Exercise QUESTION BANK|40 Videos

  • ELECTRIC CHARGES AND FIELDS

    CENGAGE PHYSICS|Exercise QUESTION BANK|40 Videos

Similar Questions

Explore conceptually related problems

The kinetic energy of the most energetic photoelectrons emitted from a metal surface is doubled when the wavelength of the incident radiation is reduced from lamda_1 " to " lamda_2 The work function of the metal is

The energy of the most energetic photoelectrons emitted from a metal target depands upon

The velocity of the most energetic electrons emitted from a metallic surface is doubled when the frequecy v of incident radiation is double. The work function of this metal is

The maximum kinetic energy of photoelectrons emitted from a metal surface increses from 0.4 eV to 1.2 eV when the frequency of the incident radiation is increased by 40% . What is the work function (in eV) of the metal surface?

If light of wavelength lambda_(1) is allowed to fall on a metal , then kinetic energy of photoelectrons emitted is E_(1) . If wavelength of light changes to lambda_(2) then kinetic energy of electrons changes to E_(2) . Then work function of the metal is

If the threshold wavelength (lambda_(0)) for ejection of electron from metal is 330 nm, then work function for the photoelectric emission is:

If the threshold wavelength (lambda_(0)) for spection of electron from metal is 350nm then work function for the photoelectric emission is

Energy required to stop the ejection of electrons from certain metal plate was found to be 0.2 eV when an electromagnetic radiation of 330 nm was made to fall on it the work function of the metal is

CENGAGE PHYSICS-DUAL NATURE OF RADIATION AND MATTER-QUESTION BANK
  1. A certain metallic surface is illuminated with monochromatic light of ...

    Text Solution

    |

  2. Photons with energy 5 eV are incident on a cathode C in a photoelectri...

    Text Solution

    |

  3. The kinetic energy of most energetic electrons emitted from a metallic...

    Text Solution

    |

  4. Work function of potassium metal is 2.30 eV . When light of frequency ...

    Text Solution

    |

  5. The threshold frequency for a certain photosensitive metal is v(0). Wh...

    Text Solution

    |

  6. X-rays are incident normally on a crystal of lattice constant 0.6nm. T...

    Text Solution

    |

  7. The de-Broglie wavelength of electrons striking the cathode to produce...

    Text Solution

    |

  8. Suppose the energy of Ka X-rays of two elements P and Q are 826.2eV an...

    Text Solution

    |

  9. What is the wavelength of a beam of X -rays (in A^o ) which is difted ...

    Text Solution

    |

  10. Light of wavelength lambda from a small 0.5 mW He-Ne laser source is u...

    Text Solution

    |

  11. A plate of mass 20mg is in equilibrium in air due to force exerted by ...

    Text Solution

    |

  12. Moseley's law for K(alpha) photon is given by sqrt(v)=a(Z-b) where a i...

    Text Solution

    |

  13. When photons of energy 4.25eV strike the surface of a metal A, the eje...

    Text Solution

    |

  14. In the figure shown, electromagnetic radiations of wavelength 200 nm ...

    Text Solution

    |

  15. A smail plate of area 1 cm^(2) is placed at a distance of (1)/(sqrt(pi...

    Text Solution

    |

  16. When a monochromatic point source of light is at a distance 0.2m from ...

    Text Solution

    |

  17. A small metal plate of area 2 cm^(2) is placed at a distance of 2 m fr...

    Text Solution

    |

  18. A light of wavelength 3540 A^o falls on a metal having work function o...

    Text Solution

    |

  19. A cooling object was emitting radiations of time varying wavelength la...

    Text Solution

    |

  20. A parallel. beam of light of intensity I is incident normally on a pla...

    Text Solution

    |