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

The photoelectric threshold wavelength for potassium (work function being `2 eV`) is

A

`310 nm`

B

`620 nm`

C

`1200 nm`

D

`2100 nm`

Text Solution

Verified by Experts

The correct Answer is:
B
`lambda = (12375)/(W_(0)) = (12375)/(2) = 6187.5 Å = 620 nm`
Promotional Banner

Topper's Solved these Questions

  • DUAL NATURE OF RADIATION AND MATTER

    A2Z|Exercise AIIMS Questions|32 Videos

  • DUAL NATURE OF RADIATION AND MATTER

    A2Z|Exercise Assertion Reason|14 Videos

  • DUAL NATURE OF RADIATION AND MATTER

    A2Z|Exercise Section B - Assertion Reasoning|18 Videos

  • CURRENT ELECTRICITY

    A2Z|Exercise Section D - Chapter End Test|29 Videos

  • ELECTRIC CHARGE, FIELD & FLUX

    A2Z|Exercise Section D - Chapter End Test|29 Videos

Similar Questions

Explore conceptually related problems

Threshold wavelength for a metal having work function w_(0) is lambda . Then the threshold wavelength for a metal having work function 2 w_(0) is

The photoelectric threshould wavelength for a metal surface is 6600 Å. The work function for this is

If threshold wavelength for sodium is 6800Å then the work function will be

The threshold wavelength of a metal having work function 2 eV is 6000 Å . What will be the threshold wavelength for the metal having a work function of 6 eV ?

The photo electric threshold wavelength for a metal is 2750A^(0) . The minimum energy of a photon that can produce photoelectric effect in the metal is - - - - ev ?

The threshold wavelength for tungsten is 2730 Å . The work function of tungsten is

What is the threshold wavelength for a cesium surface, for which the work function is 1.8 eV ?

A metal has a work function phi_(0) and its corresponding threshold wavelength is lambda_(0) . If the threshold wavelength for a metal whose work function is (phi_(0))/(3) is n lambda_(0) , then what is the value of n ?

A2Z-DUAL NATURE OF RADIATION AND MATTER-AIPMT/NEET Questions
  1. The photoelectric threshold wavelength for potassium (work function be...

    Text Solution

    |

  2. A photocell is illuminated by a small bright source places 1 m away w...

    Text Solution

    |

  3. Let K(1) be the maximum kinetic energy of photoelectrons emitted by a ...

    Text Solution

    |

  4. Which of the following is not the property of a cathode rays

    Text Solution

    |

  5. If particles are moving with same velocity , then maximum de - Broglie...

    Text Solution

    |

  6. A 1 mu A beam of protons with a cross - sectional area of 0.5 sq.mm is...

    Text Solution

    |

  7. The work function of a metal is 4.2 eV , its threshold wavelength will...

    Text Solution

    |

  8. A photoelectric cell is illuminated by a point source of light 1 m awa...

    Text Solution

    |

  9. According to Einstein's photoelectric equation , the graph between the...

    Text Solution

    |

  10. A photosensitive metallic surface has work function , h v(0). If photo...

    Text Solution

    |

  11. The work function for metals A , B and C are respectively 1.92 eV , 2....

    Text Solution

    |

  12. When photons of energy hv fall on an aluminium plate (of work function...

    Text Solution

    |

  13. In a discharge tube ionization of enclosed gas is produced due to coll...

    Text Solution

    |

  14. A photocell employs photoelectric effect to convert

    Text Solution

    |

  15. The momentum of a photon of energy 1 MeV "in" kg m//s will be

    Text Solution

    |

  16. Monochromatic light of frequency 6.0xx10^(14)Hz is produced by a laser...

    Text Solution

    |

  17. A 5 W source emits monochromatic light of wavelength 5000 Å. When plac...

    Text Solution

    |

  18. The work function of a surface of a photosensitive material is 6.2 eV...

    Text Solution

    |

  19. In the phenomenon of electric discharge through gases at low pressure ...

    Text Solution

    |

  20. A particle of mass 1 mg has the same wavelength as an electron moving ...

    Text Solution

    |