Home
Class 12
PHYSICS
Work function for monlybdenum is 4.2 eV....

Work function for monlybdenum is 4.2 eV. Determine the threshold wavelength of photoelectric effect for molybdenum.

Text Solution

Verified by Experts

The correct Answer is:
`2958 Å`
Promotional Banner

Topper's Solved these Questions

  • QUANTUM THEORY

    CHHAYA PUBLICATION|Exercise Exercise (Problem Set- II)|15 Videos
  • QUANTUM THEORY

    CHHAYA PUBLICATION|Exercise Exercise (Hots Numerical Problems)|4 Videos
  • QUANTUM THEORY

    CHHAYA PUBLICATION|Exercise Exercise (Short Answer Type Questions- II)|4 Videos
  • OPTICAL INSTRUMENTS

    CHHAYA PUBLICATION|Exercise CBSE SCANNER|8 Videos
  • QUESTION PAPER OF NEET 2017

    CHHAYA PUBLICATION|Exercise QUESTION PAPERS OF (NEET) (2017)|39 Videos

Similar Questions

Explore conceptually related problems

The threshold frequency of a photoelectric effect depends on

The work function for cesium atom is 1.9 eV. Calculate the threshold wavelength.

Ratio of the work functions of two metal surface is 1 : 2 . If threshold wavelength of photoelectric effect for the 1st metal is 6000Å , what is the corresponding value for the 2nd metal surface?

Einstein's equation for photoelectric effect is E_("max") = hf - W_(0) , where h = Planck's constant = 6.625 xx 10^(-34) J.s, f = frequency of light incident on metal surface, W_(0) = work function of metal and E_("max") = maximum kinetic energy of the emitted photoelectrons. It is evident that if the frequency f is less than a minimum value f_(0) or if the wavelength lamda is greater than a maximum value lamda_(0) , the value of E_("max") would be negative, which is impossible. Thus for a particular metal surface f_(0) is the threshold frequency and lamda_(0) is the threshold wavelength for photoelectric emssion to take place. Again if the collector plate is ketp at a negative potential with respect to the emitter plate, the velocity of the photoelectrons would decrease. The minimum potential for which the velocity of the speediest electron becoes zero, is known as the stopping potential, the photoelectric effect stops for a potential lower than this. [velocity of light = 3xx 10^(8) m.s^(-1) , mass of an electron m = 9.1 xx 10^(-31) kg , charge of an electron, e = 1.6 xx 10^(-19)C The threshold wavelength of photoelectric effect for a metal surface is 4600 Å . Work function of the metal (in eV) is

Energy of incident photon on a metal surface is 5.0 eV and photoelectric stopping potential is 3.23V. Determine the threshold wavelength for the metal.

Statement I: The stopping potential becomes double when the frequency of the incident radiation is doubled Statement II: Work function of the metal and the threshold frequency of photoelectric effect are proportional to each other.

What is threshold frequency in connecting with photoelectric effect?

The work function for a certain metal is 4.2 eV. Will this metal give photoelectric emission for incident radiation of wavelenght 330 nm?

Work function of a metal is 4.0 eV. Find the maximum value of wavelength of a radiation that can emit photoelectrons from the metal.

CHHAYA PUBLICATION-QUANTUM THEORY-Exercise (Problem Set- I)
  1. The photon energy of a radiation is 1keV. What will be its (i) frequen...

    Text Solution

    |

  2. The photon energy corresponding to a radiation of wavelength 5000 Å is...

    Text Solution

    |

  3. Work function for monlybdenum is 4.2 eV. Determine the threshold wavel...

    Text Solution

    |

  4. Work function for a metal is 1.77 eV and the wavelength of an incident...

    Text Solution

    |

  5. Energy of incident photon on a metal surface is 5.0 eV and photoelectr...

    Text Solution

    |

  6. thresold Wavelength of incident light on a metal surface is 404 Å. Det...

    Text Solution

    |

  7. Stopping poential for the electrons emitted due to incidence of light ...

    Text Solution

    |

  8. For photoelectric emission, threshold wavelength of a metal is 2460 Å....

    Text Solution

    |

  9. The stopping potential of copper is 2.72V for light of wavelength 1849...

    Text Solution

    |

  10. When radiation of wavelength lamda is incidenton a metallic surface, t...

    Text Solution

    |

  11. work function for electronic emission from sodium is 1.77 eV. What is ...

    Text Solution

    |

  12. The work function for electron emission from a metal is 1.9 eV, and t...

    Text Solution

    |

  13. The photoelectric threshold wavelength of radiation incident on its su...

    Text Solution

    |

  14. The photoelectric work function of a metal is 1.2 eV. What will be the...

    Text Solution

    |

  15. The photoelectric work function of a metal is 3800 Å. If an ultraviole...

    Text Solution

    |

  16. Find out the photoelectric threshold wavelength of copper. Given work ...

    Text Solution

    |

  17. Find the photoelectric threshold frequency of a metal is 6525 Å. What ...

    Text Solution

    |

  18. A monochromatic source, emitting light of wavelength, 600 nm, has a po...

    Text Solution

    |

  19. The threshold frequency of a metal is f(0). When the light of frequenc...

    Text Solution

    |

  20. By how much would the stopping potential for given photosensitive surf...

    Text Solution

    |