Home
Class 11
PHYSICS
A photoelectric surface is illuminated s...

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 than in the first case , the work function of the surface of the material is
(`h` = Plank's constant , `c` = speed of light )

A

`(hc)/(3lambda)`

B

`(hc)/(2lambda)`

C

`(hc)/(lambda)`

D

`(2hc)/(lambda)`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • ELECTRONS AND PHOTONS

    TARGET PUBLICATION|Exercise Evaluation Test|19 Videos

  • ELECTRONS AND PHOTONS

    TARGET PUBLICATION|Exercise Critical thinking|22 Videos

  • COMMUNICATION SYSTEMS

    TARGET PUBLICATION|Exercise Evaluation Test|15 Videos

  • FORCE

    TARGET PUBLICATION|Exercise Evaluation Test|16 Videos

Similar Questions

Explore conceptually related problems

Light of wavelength 4000 Å is incident on a metal surface. The maximum kinetic energy of emitted photoelectron is 2 eV. What is the work function of the metal surface ?

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.

When a metallic surface is illuminated with monochromatic light of wavelength lambda , the stopping potential is 5 V_0 . When the same surface is illuminated with light of wavelength 3lambda , the stopping potential is V_0 . If work function of the metallic surface is

When a metal surface is illuminated by light wavelengths 400 nm and 250 nm , the maximum velocities of the photoelectrons ejected are upsilon and 2 v respectively . The work function of the metal is ( h = "Planck's constant" , c = "velocity of light in air" )

A light of wavelength 600 nm is incident on a metal surface. When light of wavelength 400 nm is incident, the maximum kinetic energy of the emitted photoelectrons is doubled. The work function of the metals is

A sodium (Na) surface is illuminated with light of wavelength 300 nm . The work function for Na metal is 2.46eV . The kinetic enegry of the ejected photoelectrons is

A metallic surface is illuminated alternatively with lights of wavelengths 3000A and 6000A . It is obseved that the maximum speeds of the photoelectrons under these illumination are in the ratio 3:1 Q. The work function of the metal is

When a metallic surface is illuminated with monochromatic light of wavelength lambda , the stopping potential is 5 V_0 . When the same surface is illuminated with the light of wavelength 3lambda , the stopping potential is V_0 . Then, the work function of the metallic surface is

When a metallic surface is illuminated with monochromatic light of wavelength lambda , the stopping potential is 5 V_0 . When the same surface is illuminated with light of wavelength 3lambda , the stopping potential is V_0 . Then the work function of the metallic surface is:

TARGET PUBLICATION-ELECTRONS AND PHOTONS-Competitive Thinking
  1. The momentum of a photon is 2 xx 10^(-16) gm - cm//sec. Its energy is

    Text Solution

    |

  2. If the energy of a photon corresponding to a wavelength of 6000 Å is 3...

    Text Solution

    |

  3. If we express the energy of a photon in KeV and the wavelength in angs...

    Text Solution

    |

  4. A metal surface of work function 1.07 eV is irradiated with light of w...

    Text Solution

    |

  5. The work function of metal is 1 eV. Light of wavelength 3000 Å is inc...

    Text Solution

    |

  6. Energy from the sun is recived on earth at the rate of 2 cal per cm^(2...

    Text Solution

    |

  7. when a monochromatic point source of light is at a distance 0.2 m from...

    Text Solution

    |

  8. When a metal surface is illuminated by light wavelengths 400 nm and 25...

    Text Solution

    |

  9. The velocity of the most energetic electrons emitted from a metallic s...

    Text Solution

    |

  10. A modern 200 W sodium street lamp emits yellow light of wavelength 0.6...

    Text Solution

    |

  11. Ultraviolet light of wavelength 300nn and intensity 1.0Wm^-2 falls on ...

    Text Solution

    |

  12. The number of photons falling per second on a completely darkened plat...

    Text Solution

    |

  13. Photoelectric emission is observed from a metallic surface for frequen...

    Text Solution

    |

  14. A photoelectric surface is illuminated successively by monochromatic l...

    Text Solution

    |

  15. Two identical photo-cathodes receive light of frequencies v1 and v2. ...

    Text Solution

    |

  16. A metal surface is illuminated by light of two different wavelengths 2...

    Text Solution

    |

  17. A photon of energy E ejects a photoelectron from a metel surface whose...

    Text Solution

    |

  18. Light of wavelength lambda(A) and lambda(B) falls on two identical met...

    Text Solution

    |

  19. The energy of the electromagetic wave is of the order of 15 keV. To wh...

    Text Solution

    |

  20. The photoelectric work function of a surface is 2.2 eV. The maximum ki...

    Text Solution

    |