Home
Class 12
PHYSICS
Light from balmer series of hydrogen is ...

Light from balmer series of hydrogen is able to eject photoelectron from a metal what can be the maximum work function of the metal?

Text Solution

Verified by Experts

The correct Answer is:
C, D
The maximum energy liberated by the Balmer Series is
`n_1=2`, `n_1=oo`
`E=13.6((1)/(n_1^2)-(1)/(n_2^2))`
`=13.6 xx 1/4 = 3.4 eV`
`3.4 eV is the maximum work function of the metal
Promotional Banner

Topper's Solved these Questions

  • BOHR'S MODEL AND PHYSICS OF THE ATOM

    HC VERMA|Exercise Objective 2|6 Videos

  • ALTERNATING CURRENT

    HC VERMA|Exercise Exercises|19 Videos

  • CAPACITORS

    HC VERMA|Exercise Exercise|2 Videos

Similar Questions

Explore conceptually related problems

Wave property of electrons implies that they will show diffraction effects. Davission and Germer demonstrated this by diffracting electrons from crystals. The law governing the diffraction from a crystal is obtained by requiring that electron waves reflected from the planes of atoms in a crystal interfere constructively (see figure) The surface of a metal is illuminated with the light of 400 nm . The kinetic energy of the ejected photoelectrons was found to be 1.68 eV . The work function of the metal is : ( hc = 1240 eV-nm )

A metallic surface is illuminated alternatively with light of wavelenghts 3000 Å and 6000 Å . It is observed that the maximum speeds of the photoelectrons under these illuminations are in the ratio 3 : 1 . Calculate the work function of the metal and the maximum speed of the photoelectrons in two cases.

0.24eV of energy is required to stop photoelectron emitted by radiation of wavelength 2480 Å . Find work function of metal used?

Two photons of energy 4 eV and 4.5 eV are incident on two metals A and B respectively.The maximum kinetic energy for an ejected electron is T_(A) for A and T_(B)=T_(A)-1.5 eV for the metal B.The relation between the de-Broglie wavelengths of the ejected electron of A and B are lambda_(B)=2lambda_(B) .The work function of the metal B is

Light of wavelength 488 nm is produced by an argon laser which is used in the photoelectric effect.When light from this spectral (cutoff)potential of photoelectrons is 0.38 V.Find the work function of the material from which the emitter is made.

Light of wavelength 488 nm is produced by an argon laser which is used in the photoelectric effect. When light from this spectral line is incident on the emitter, the stopping (cut-off) potential of photoelectrons is 0.38 V. Find the work function of the material from which the emitter is made.

A photoelectric surface is illuminated successively by monochromatic light of wavelength lambda and (lambda)/(2) .If the maximum kinetic energy of the emitted photoelectrons in the second case is 3 times in the first case,the work function of the surface of the material is: (h=Plank's constant ,c=speed of light)

The photons from the Balmer series in Hydrogen spectrum having wavelength between 450 nm to 700 nm are incident on a metal surface of work function 2 eV Find the maximum kinetic energy of ejected electron (Given hc = 1242 eV nm)

HC VERMA-BOHR'S MODEL AND PHYSICS OF THE ATOM-Exercises
  1. A beam of light having wavelength distributed uniformly between 450 nm...

    Text Solution

    |

  2. Radiation coming from transition n = 2 to n = 1 of hydrogen atoms fall...

    Text Solution

    |

  3. A hydrogen atom in ground state obsebe a photon of ultraviolet raditio...

    Text Solution

    |

  4. A parallel beam of light of wavelength 100 nm passes through a sample ...

    Text Solution

    |

  5. A beam of momechromatic light of wavelength lambda ejectes photonelect...

    Text Solution

    |

  6. Electron are emited from an electron gun at almost zero velocity and a...

    Text Solution

    |

  7. A neutron having kinetic energy 12.5eV collides with a hydrogen atom ...

    Text Solution

    |

  8. a hydrogen atom moving at speed upsilon collides with another hydrogen...

    Text Solution

    |

  9. A neutron moving with a speed u strikes a hydrogen atom in ground stat...

    Text Solution

    |

  10. When a photon is emited by a hydrogen atom , the photon carries a mome...

    Text Solution

    |

  11. When a photon is emitted from an atom , the atom recils The kinetic en...

    Text Solution

    |

  12. The light emitted in the transition n = 3 to n= 2 in hydrogen is calle...

    Text Solution

    |

  13. Light from balmer series of hydrogen is able to eject photoelectron fr...

    Text Solution

    |

  14. Radiation from hydrogen discharge tube falls on a cesium plate find th...

    Text Solution

    |

  15. A filter transition only the radiationof wavelength greater than 440 n...

    Text Solution

    |

  16. The earth revolves round the sun due to gravitatinal attraction. Supp...

    Text Solution

    |

  17. Consider a neutrom and an electron bound to each other due to gravitat...

    Text Solution

    |

  18. A uniform magnetic field B exists in a region. An electrons projected...

    Text Solution

    |

  19. Suppose in an imginary world the angular momentum is quantized to be e...

    Text Solution

    |

  20. Consider an excited hydrogen atom in state n moving with a velocity up...

    Text Solution

    |