Home
Class 12
PHYSICS
The photoelectric threshold wavelength f...

The photoelectric threshold wavelength for lithium is `8000 Å`. Find the maximum kinetic energy in eV of the emitted electrons from the surface by light of wavelength `6000 Å`. Take `h=6.6 xx 10^(-34) Js`.

Text Solution

Verified by Experts

The correct Answer is:
0.5156 eV
Promotional Banner

Topper's Solved these Questions

  • ELECTRONS AND PHOTONS

    SL ARORA|Exercise TYPE E : Problem For Self Practice|11 Videos

  • ELECTRONS AND PHOTONS

    SL ARORA|Exercise TYPE C : Problem For Self Practice|11 Videos

  • ELECTROMAGNETIC WAVES

    SL ARORA|Exercise Problem for self-practice|21 Videos

  • ELECTROSTATIC FORCES, CHARGES AND FIELDS

    SL ARORA|Exercise Problems For Self Practice|1 Videos

Similar Questions

Explore conceptually related problems

Find the difference of kinetic energies of photoelectrons emitted from a surface by light of wavelength 2500Å and 5000Å. h=6.62xx10^(-34)Js .

The photo electric threshold wavelength of Tungsten is 2300 Å. The energy of the electrons ejected from the surface by ultraviolet light of wavelenghth 1800 Å is

The photoelectric threshold wavelength of a metal is 300 nm. The maximum kinetic energy of electrons ejected from the metal surface by ultraviolet light of wavelength 250 nm is nearly (h = 4.14*10^-15 eV s and c= 3*10^8 ms^-1)

The photoelectric threshold wavelength for tungsten is 2400 Å . Determine the energy of the electrons ejected from its surface when exposed to ultraviolet radiations of wavelength 1200 Å .

The energy of a photon of wavelength 4000 Å is (use h=6.66xx10^(-34) J-s)

The photoelectric threshold for a certain metal surface is 330 Å . What is the maximum kinetic energy of the photoelectrons emitted , if radiations of wavelength 1100 Å are used ?

Calculate the energy in eV for each photon for light of wavelength 4950Å . Take h=6.6xx10^(-34)J-s

The threshold wavelenght of silver is 3800 Å . Calculate the maximum kinetic energy in eV of photoelelctrons emitted, when ultraviolet light of wavelegth 2600 Å falls on it. ( Planck's constant, h=6*63xx10^(-34)"Js",. Velocity of light in air, c=3xx10^(8)m//s )

The photoelectric work function of a metal is 3 eV . The maximum kinetic energy of the emitted electrons when light of wavelength 3000 Å falls on it is

SL ARORA-ELECTRONS AND PHOTONS-TYPE D : Problem For Self Practice
  1. If a photoemissive surface has a threshold frequency of 3 xx 10^(14) H...

    Text Solution

    |

  2. The work function for a metal surface is 2.0 eV. Determine the longest...

    Text Solution

    |

  3. A metal has a threshold wavelength fo 6000 Å. Calculate (i) threshold ...

    Text Solution

    |

  4. Photoelectric work function for a surface is 2.4 eV. Light of waveleng...

    Text Solution

    |

  5. Calculate the kinetic energy of a photoelectron (in eV) emitted on shi...

    Text Solution

    |

  6. What is the energy of emitted photoelectrons is light of frequency 10^...

    Text Solution

    |

  7. If the speed of photoelectrons is 10^(4) ms^(-1), what should be the f...

    Text Solution

    |

  8. Which of the metal sodium and copper will be suitable for photelectric...

    Text Solution

    |

  9. (a) The work function for the surface of aluminium is 4.2eV. How much ...

    Text Solution

    |

  10. The photoelectric threshold wavelength for lithium is 8000 Å. Find the...

    Text Solution

    |

  11. The wavelength of a photon is 1.4 Å. It collides with an electron. Its...

    Text Solution

    |

  12. The energy of photoelectrons emitted from a sensitive plate is 1.56 eV...

    Text Solution

    |

  13. The mercury line of wavelength 2356 Å is used to eject photoelectrons ...

    Text Solution

    |

  14. The photoelectric threshold wavelength for tungsten is 2400 Å. Determi...

    Text Solution

    |

  15. The cathode of a photocell is irradiated with light of wavelength 3000...

    Text Solution

    |

  16. Find the maximum velocity of photoelectrons emitted by radiation of fr...

    Text Solution

    |

  17. Given that a photon of light of wavelength 10,000Å has an energy equal...

    Text Solution

    |

  18. Ultraviolet light of wavelength 800 A and 700 A when allowed to fall ...

    Text Solution

    |

  19. When light of wavelength 400nm is incident on the cathode of photocell...

    Text Solution

    |

  20. (a) If the wavelength of the light incident on a photoelectric cell be...

    Text Solution

    |