Home
Class 12
PHYSICS
Threshold wavelength for a metal having ...

Threshold wavelength for a metal having work function `w_(0)` is `lambda`. Then the threshold wavelength for a metal having work function `2 w_(0)` is

A

`4 lambda`

B

`2 lambda`

C

`lambda//2`

D

`lambda//4`

Text Solution

Verified by Experts

`w_(0)=(hc)/(lambda_(0))`
Promotional Banner

Topper's Solved these Questions

  • DUAL NATURE OF RADIATION AND MATTER

    NARAYNA|Exercise EXERCISE - 2 (C.W)|25 Videos

  • DUAL NATURE OF RADIATION AND MATTER

    NARAYNA|Exercise EXERCISE - 2 (H.W)|20 Videos

  • DUAL NATURE OF RADIATION AND MATTER

    NARAYNA|Exercise EXERCISE - 1 (C.W)|40 Videos

  • CURRENT ELECTRICITY

    NARAYNA|Exercise Level 6|43 Videos

  • DUAL NATURE

    NARAYNA|Exercise LEVEL-II (H.W)|17 Videos

Similar Questions

Explore conceptually related problems

The thereshold wavelenght for a metal of work function W_(0) is lambda . The threshold wavelenght for a metal having work function 3W_(0) will be

The threshold wavelength of a metal having work function 2 eV is 6000 Å . What will be the threshold wavelength for the metal having a work function of 6 eV ?

The photoelectric threshold wavelength for potassium (work function being 2 eV ) is

The photoelectric threshould wavelength for a metal surface is 6600 Å. The work function for this is

The work function of a metal is 4.2 eV , its threshold wavelength will be

The work function for a metal whose threshold wavelength is 5000 Å is

If threshold wavelength for sodium is 6800Å then the work function will be

The work function of sodium is 2.3 eV . The threshold wavelength of sodium will be

The threshold wavelength for tungsten is 2730 Å . The work function of tungsten is

NARAYNA-DUAL NATURE OF RADIATION AND MATTER-EXERCISE - 1 (H.W)
  1. A photoelectron is moving with a maximum velocity of 10^(6) m//s. Give...

    Text Solution

    |

  2. A metal of work function 4eV is cexposed to a radiation of wavelegth 1...

    Text Solution

    |

  3. Threshold wavelength for a metal having work function w(0) is lambda. ...

    Text Solution

    |

  4. The work functions of metals A and B are in the ratio 1 : 2. If light ...

    Text Solution

    |

  5. The threshold wavelength for photoelectric emission from a material ...

    Text Solution

    |

  6. An AIR station is broadcasting the waves of wavelength 300 metres. If ...

    Text Solution

    |

  7. The energy of a photon is E = hv and the momentum of photon p = (h)/(l...

    Text Solution

    |

  8. The approximate wavelength of a photon of energy 2.48 eV is

    Text Solution

    |

  9. An important spetral emission line has a wavelength of 21 cm. The corr...

    Text Solution

    |

  10. A particle having a de Broglie wavelength of 1.0 A^(0) is associated w...

    Text Solution

    |

  11. The de - Broglie wavelength of an electron having 80 ev of energy is n...

    Text Solution

    |

  12. Electrons are accelerated through a p.d. Of 150V. Given m=9.1xx10^(-31...

    Text Solution

    |

  13. If accelerating potential of an alpha particle is doubled than its new...

    Text Solution

    |

  14. The ratio of the deBroglie wavelengths of proton, deuteron and alpha p...

    Text Solution

    |

  15. The energy that should be added to an electron, to reduce its de-Brogl...

    Text Solution

    |

  16. The de - Broglie wavelength of an electron having 80 ev of energy is n...

    Text Solution

    |

  17. If particles are moving with same velocity , then maximum de - Broglie...

    Text Solution

    |

  18. The wavelength of most energetic X-rays emitted when a metal target is...

    Text Solution

    |

  19. X - rays which can penetrate through longer distances in substance are...

    Text Solution

    |

  20. An X - ray machine has an accelerating potential difference of 25,000 ...

    Text Solution

    |