Home
Class 12
PHYSICS
Find out the photoelectric threshold wav...

Find out the photoelectric threshold wavelength of copper. Given work function of copper `= 4.52eV, h = 6.6 xx 10^(-34)J.s, 1 eV = 1.6 xx 10^(-19)J`

Text Solution

Verified by Experts

The correct Answer is:
`2750 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 stopping potential any material is 1.4Volt.What will its threshold wavelength if the value of incident radiation is 5.6 eV. . [h = 6 .63 xx 10^(-34) Js, C= 3 xx 10^8 m//s, eV = 1.6 xx 10^(-19) J] .

Find the wavelength of an electron having kinetic energy 10 eV. (h = 6.33 xx 10^(-34) J.s, m_(e) = 9 xx 10^(-31) kg)

Light of wavelength 4000 Å is incident on barium. The emitted photoelectrons describe a circle of radius 50 cm by a magnetic field of flux density 5.26 xx 10^(-6)T . What is the work function of barium in eV? Given, h = 6.6 xx 10^(-34)J.s, " " e = 1.6 xx 10^(-19)C, " " m_(e) = 9.1 xx 10^(-31) kg

Work function of a metal is 2.3eV and on 1.0 cm^(2) area of that metal, a light of intensity 8.6 xx 10^(3) W.m^(-2) is incident. That intensity is distributed equally among the wavelength 4144 Å, 4972 Å and 6216 Å . If no ray is lost due to scattering and if each of the photons of proper energy can emit photoelectrons, what will be the number of photoelectrons emitted in 2 s? (h = 6.63 xx 10^(-34) J.s, 1eV = 1.6 xx 10^(-19)J)

Light of wavelength 6000Å is incident on a metal. To release an electron from the metal surface, 1.77 eV of energy is needed. Find the kinetic energy of the fastest photoelectron. What is the threshold frequency of the metal? (h = 6.62 xx 10^(-27) " erg".s, 1eV = 1.6 xx 10^(-12) " erg")

When radiation of wavelength 4940 Å is incident on a metal surface photoelectricity is generated. For a potential difference 0.6 V between cathode and anode, photocurrent stops. For another incident radiation, the stopping potential changes to 1.1V. Find work function of the metal and wavelength of the second radiation. (h = 6.6 xx 10^(-27) " erg".s, e = 1.6 xx 10^(-19) C)

A metal has a work function of 2eV. It is illuminated by monochromatic light of wavelength 500 nm, calculate (i) the threshold wavelength, (ii) the maximum energy of photoelectrons, (iii) The stopping potential. Given Planck's constant h = 6.6 xx 10^(-34)J.s , charge on electron e = 1.6 xx 10^(-19) C and 1eV = 1.6 xx 10^(-19)J

The maximum velocities of the photoelectrons ejected are v and 2v for incident light of wavelength 400 nm and 250 nm on a metal surface respectively. Calculate the work function of the metal. Given h = 6.63 xx 10^(-34)J.s and c = 3 xx 10^(8) m.s^(-1)

Maximum kinetic energy of the released photoelectrons emitted from metallic sodium, when a light is incident on it, 0.73 eV. If the work function of sodium is 1.82eV, find the energy of the incident photon in eV. Find wavelength of incident light. ( h = 6.63 xx 10^(-27) erg. s, 1eV = 1.6 xx 10^(-12) erg)

What is the de Broglie wavelength related to an electron of energy 100 eV ? (Given, mass of electron, m = 9.1 xx 10^(-31) kg, " " e = 1.6 xx 10^(-19) C and h = 6.63 xx 10^(-34) J.s )

CHHAYA PUBLICATION-QUANTUM THEORY-Exercise (Problem Set- I)
  1. The photoelectric work function of a metal is 1.2 eV. What will be the...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  8. Calculate the threshold frequency of photon for photoelectric emission...

    Text Solution

    |

  9. Calculate the kinetic energy of photoelectrons in eV emitted on shinin...

    Text Solution

    |

  10. Calculate the maximum kinetic energy of electrons emitted from a phot...

    Text Solution

    |

  11. The de Broglie wavelength associated with a moving particle changes fr...

    Text Solution

    |

  12. Determine the de Broglie wavelength of an electron moving with velocit...

    Text Solution

    |

  13. For a moving electron, the de Broglie wavelength is 1 Å. What will be ...

    Text Solution

    |

  14. If an electron is send through a potential difference of 60V, what wil...

    Text Solution

    |

  15. The de Broglie wavelength of a moving electron is 1 Å. What is its vel...

    Text Solution

    |

  16. A neutron of mass 1.66xx10^(-27) kg has a kinetic energy of 0.04eV. Wh...

    Text Solution

    |

  17. What is the de Broglie wavelength of an alpha-particle moving with a v...

    Text Solution

    |

  18. What will be the de Broglie wavelength of an electron of kinetic energ...

    Text Solution

    |

  19. The wavelength associated with a photon and the de Broglie wavelength ...

    Text Solution

    |

  20. Calculate de Broglie wavelength of an electron beam accelerated throug...

    Text Solution

    |