Home
Class 12
PHYSICS
It is harder to remove free electrons fr...

It is harder to remove free electrons from copper than from sodium. Which has higher work function.

Text Solution

Verified by Experts

It is easy to remove an electron from sodium than copper because work function of sodium is smaller than that of copper.
Copper has higher value of threshold frequency than sodium.
Promotional Banner

Topper's Solved these Questions

  • PARTICLE NATURE OF RADIATION

    BETTER CHOICE PUBLICATION|Exercise SHORT ANSWER TYPE QUESTIONS MOST EXPECTED QUESTIONS)|3 Videos

  • PARTICLE NATURE OF RADIATION

    BETTER CHOICE PUBLICATION|Exercise NUMERICAL PROBLEMS |32 Videos

  • PARTICLE NATURE OF RADIATION

    BETTER CHOICE PUBLICATION|Exercise VERY SHORT ANSWER QUESTIONS (MOST EXPECTED QUESTIONS)|6 Videos

  • OPTICAL INSTRUMENTS

    BETTER CHOICE PUBLICATION|Exercise NUMERICALS PROBLEMS |15 Videos

  • POLARISATION OF LIGHT

    BETTER CHOICE PUBLICATION|Exercise Most Expected Questions|4 Videos

Similar Questions

Explore conceptually related problems

It is easier to remove an electron from sodium than from copper, why? Which metal has higher value of threshold frequency?

Light from a dicharge tube containing hydrogen atoms falls on the surface of sodium.The kinetic energy of the fastest electrons emitted from sodium is 0.73 eV.The work function for sodium is 1.82 eV. Find the energy of the photons causing the photoelectric emission,

Light from a dicharge tube containing hydrogen atoms falls on the surface of sodium.The kinetic energy of the fastest electrons emitted from sodium is 0.73 eV.The work function for sodium is 1.82 eV.find the quantum numbers of the two levels involved in the emission of these photons,

Light from a dicharge tube containing hydrogen atoms falls on the surface of sodium.The kinetic energy of the fastest electrons emitted from sodium is 0.73 eV.The work function for sodium is 1.82 eV.find the recoil speed of the emitting atom assuming it to be at rest before the transmition.(Ionisation energy of hydrogen is 13.6 eV).

Visible light cannot eject photoelectrons from copper surface, whose work function is 4.4 eV. Why? Prove it mathematically.

Which weedicides are used to remove weeds from the crops?

BETTER CHOICE PUBLICATION-PARTICLE NATURE OF RADIATION-SHORT ANSWER TYPE QUESTIONS
  1. What is the rest mass of a photon?

    Text Solution

    |

  2. What is photo electric cells? Give its two applications.

    Text Solution

    |

  3. It is harder to remove free electrons from copper than from sodium. Wh...

    Text Solution

    |

  4. Blue light can eject electrons from a Photo-sensitive surface, while ...

    Text Solution

    |

  5. Derive Einstein's' photoelectric equation in terms of frequency.

    Text Solution

    |

  6. State the four laws of photoelectric emission.

    Text Solution

    |

  7. What are Photons? Give its two properties.

    Text Solution

    |

  8. Green light ejects electrons from a certain photosensitive surface, ye...

    Text Solution

    |

  9. Write Einsteins's photoelectric equation.

    Text Solution

    |

  10. What is phtotelecric effect?Explain the effect of increase of intensi...

    Text Solution

    |

  11. Define photoeletjric effect ,work function,stopping potential and thre...

    Text Solution

    |

  12. What are Photons? Give its two properties.

    Text Solution

    |

  13. Derive Einstein's' photoelectric equation in terms of frequency.

    Text Solution

    |

  14. What is photoelectric effect? State it laws?

    Text Solution

    |

  15. What is photoelectric cell? Explain any one of the photoelectric cells...

    Text Solution

    |

  16. What is photoelectric cell?How dies it work ?Give its practical uses.

    Text Solution

    |

  17. What is photoelectric effect?

    Text Solution

    |

  18. Write Einsteins's photoelectric equation.

    Text Solution

    |

  19. State the four laws of photoelectric emission.

    Text Solution

    |

  20. What is photoelectric effect?

    Text Solution

    |