Home
Class 11
PHYSICS
A surface receives light of wavelength l...

A surface receives light of wavelength `lambda_1=450` nm, causing the ejection of photo-electrons for which the stopping potential is `V_(S_1)=0.2 V.` If the radiations of wavelength `lambda_2=120` nm are now incident on the surface, the threshold frequency for the surface is

A

`2.4 xx10^13 Hz`

B

`4.3xx10^13 Hz`

C

`6.2 xx10^14Hz`

D

`8.5 xx10^14 Hz`

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • ELECTRONS AND PHOTONS

    TARGET PUBLICATION|Exercise Competitive Thinking|78 Videos

  • COMMUNICATION SYSTEMS

    TARGET PUBLICATION|Exercise Evaluation Test|15 Videos

  • FORCE

    TARGET PUBLICATION|Exercise Evaluation Test|16 Videos

Similar Questions

Explore conceptually related problems

A surface has light of wavelength lamda_1=550nm incident on it, causeing the ejection of photoelectrons for which the shopping potential is V_(s1)=0.19V . If the radiation of wavelength lamda_2=190nm is now incident on the surface, (a) calculate the stopping potential V_(s2) , (b) the work function of the surface, and (c) the threshold frequency for the surface.

Photoelectrons ar ejected from a surface when light of wavelenght lamda_1=550 nm is incident on it. The stopping potential for such electrons is lamda_(S1)=0.19V . Suppose that radiation of wavelength lamda_2=190nm is incident of the surface. ltbRgt Q. Calculate the threshold frequency for the surface.

Photoelectrons ar ejected from a surface when light of wavelenght lamda_1=550 nm is incident on it. The stopping potential for such electrons is lamda_(S1)=0.19V . Suppose that radiation of wavelength lamda_2=190nm is incident of the surface. Q. Calulate the work function of the surface.

Photoelectrons ar ejected from a surface when light of wavelenght lamda_1=550 nm is incident on it. The stopping potential for such electrons is lamda_(S1)=0.19V . Suppose that radiation of wavelength lamda_2=190nm is incident of the surface. Q. Calculate the stopping potential V_(S2) .

When light of wavelength lambda is incident on photosensitive surface, the stopping potential is V. When light of wavelength 3lambda is incident on same surface, the stopping potential is V/6 Thereshould wave length for the surface is

When a photosensitive surface is illuminated with light of wavelength lambda , the stopping potential is V_(0) . But when light of wavelength 2lambda is incident on the same surface, the stopping potential is (V_(0))/(4) . What is the threshold wavelength for the surface ?

When a metallic surface is illuminated with monochromatic light of wavelength lambda stopping potential for photoelectric current is 3 V_(0) . When the same metal surface Illuminated with a light of wavelength 2lambda , the stopping potential is V_(0) The threshold wavelength for the surface is

When radiation of wavelength lambda is used to illuminate a metallic surface , the stopping potential is V. When the same suface is illuminated with radiation of wavelength 3 lambda the stopping is V/4 . If the therehold wavelength for the metallic

TARGET PUBLICATION-ELECTRONS AND PHOTONS-Evaluation Test
  1. Relation between the stopping potential V0 of a metal and the maximum ...

    Text Solution

    |

  2. Radiation of wavelength 120 nm ejects photoelectrons from a plate whos...

    Text Solution

    |

  3. A surface receives light of wavelength lambda1=450 nm, causing the eje...

    Text Solution

    |

  4. Assertion: Photons can exist at rest. Reason: Rest mass m0=msqrt(((1...

    Text Solution

    |

  5. When a monochromatic point source of light is at a distance of 0.2 m f...

    Text Solution

    |

  6. Assertion: Work function of a metal is 4 eV. The maximum wavelength of...

    Text Solution

    |

  7. Eye of an experimenter detects the green light (lambda =4000 Å) at 5xx...

    Text Solution

    |

  8. Photon having wavelength lambda = 3.5xx10^(-7)m and lambda = 5.4xx10^(...

    Text Solution

    |

  9. Illuminating a metal surface alternately with wavelengths lambda1 and ...

    Text Solution

    |

  10. A proton when accelerated through a potential difference of V volt has...

    Text Solution

    |

  11. The work function for the following metals is given Na: 2.75 eV, K:2.3...

    Text Solution

    |

  12. Assertion: Work function of a metal is proportional to maximum wavelen...

    Text Solution

    |

  13. The retarding potential for having zero photo - electron current

    Text Solution

    |

  14. A proton and an alpha-particle are accelerated through same potential ...

    Text Solution

    |

  15. Light of wavelength 3000 Å falls on a sensitive surface. If the surfac...

    Text Solution

    |

  16. The work function for aluminium is 4.125 eV. The cut-off wavelength fo...

    Text Solution

    |

  17. Two metallic plates P(collector) and Q (emitter) are separated by a di...

    Text Solution

    |

  18. Lights of two different frequencies whose photons have energies 1 eV a...

    Text Solution

    |

  19. When a metal surface is illuminated by a monochromatic light of wave-l...

    Text Solution

    |