Home
Class 12
PHYSICS
Lights of two different frequencies whos...

Lights of two different frequencies whose photons have energies `1 eV` and `2.5eV` illuminate a metallic surface whose work function is `0.5eV` successively. The ratio of maximum speed of emitted electrons in the first case to that in the second case will be

Text Solution

Verified by Experts

The correct Answer is:
0.5
Promotional Banner

Topper's Solved these Questions

  • Current Electricity

    CENGAGE PHYSICS|Exercise QUESTION BANK|40 Videos

  • ELECTRIC CHARGES AND FIELDS

    CENGAGE PHYSICS|Exercise QUESTION BANK|40 Videos

Similar Questions

Explore conceptually related problems

Light of two different frequencies whose photons have energies 1eV and 2.5 eV respectively illuminate a metallic surface whose work function is 0.5 eV successively. Ratio of maximum kinetic energy of emitted electrons will be:

Lights of two different frequencies whose photons have energies 1 and 2.5 eV, respectively, successively illuminate a metal whose work function is 0.5 eV. The ratio of the maximum speeds of the emitted electrons

Lights of two different frequencies whose photons have energies 1 eV and 2.5 eV respectively illuminate successively a metal surface whose work function is 0.6 eV. The ratio of the maximum speeds of the emitted electrons will have

Two radiations of photons energies 1 eV and 2.5 eV, successively illuminate a photosensitive metallic surface of work function 0.5 eV. The ratio of the maximum speeds of the emitted electrons is

Two radiation of photons energy 3eV and 4.5 eV successively illuminate a photosensitive metallic surface of work function 2.5 eV the ratio of the maximum speeds of the emitted electrons is :-

Photons of energy 1.5 eV and 2.5 eV are incident on a metal surface of work function 0.5 eV. What is the ratio of the maximum kinetic energy of the photoelectrons ?

Two differenct photons of energies, 1 eV and 2.5 eV, fall on two identical metal plates having work function 0.5 eV, Then the ratio of maximum KE of the electrons emitted from the two surface is -

Photons of energy 6 eV are incident on a metal surface whose work function is 4 eV . The minimum kinetic energy of the emitted photo - electrons will be

A photon of energy 12 V falls on metal surface whose work function is 4.15 eV . The stopping potential is

Knowledge Check

  • Light of two different frequencies whose photons have energies 1eV and 2.5 eV respectively illuminate a metallic surface whose work function is 0.5 eV successively. Ratio of maximum kinetic energy of emitted electrons will be:

    A
    `1:4`
    B
    `1:2`
    C
    `1:1`
    D
    `1:5`

  • Lights of two different frequencies whose photons have energies 1 and 2.5 eV, respectively, successively illuminate a metal whose work function is 0.5 eV. The ratio of the maximum speeds of the emitted electrons

    A
    `1:5`
    B
    `1:4`
    C
    `1:2`
    D
    `1:1`

  • Lights of two different frequencies whose photons have energies 1 eV and 2.5 eV respectively illuminate successively a metal surface whose work function is 0.6 eV. The ratio of the maximum speeds of the emitted electrons will have

    A
    `1:2`
    B
    `1:3`
    C
    `1:4`
    D
    `1:5`
    • CENGAGE PHYSICS-DUAL NATURE OF RADIATION AND MATTER-QUESTION BANK
    1. Lights of two different frequencies whose photons have energies 1 eV a...

      Text Solution

      |

    2. The Davisson-Germer experiments that first demonstrated the wave natur...

      Text Solution

      |

    3. If the potential differenceappliedtoan X-raytubeis 5 kV and the curren...

      Text Solution

      |

    4. When a metallic surface is illuminated with monochromatic light of wav...

      Text Solution

      |

    5. A 200 W sodium street lamp emits, yellow light of wavelength 0.6 mu m....

      Text Solution

      |

    6. Light with an enargy flux of 25xx10^(4) Wm^(-2) falls on a perfectly r...

      Text Solution

      |

    7. If the kinetic energy of the particle is increased to 16 times its pre...

      Text Solution

      |

    8. A certain metallic surface is illuminated with monochromatic light of ...

      Text Solution

      |

    9. Photons with energy 5 eV are incident on a cathode C in a photoelectri...

      Text Solution

      |

    10. The kinetic energy of most energetic electrons emitted from a metallic...

      Text Solution

      |

    11. Work function of potassium metal is 2.30 eV . When light of frequency ...

      Text Solution

      |

    12. The threshold frequency for a certain photosensitive metal is v(0). Wh...

      Text Solution

      |

    13. X-rays are incident normally on a crystal of lattice constant 0.6nm. T...

      Text Solution

      |

    14. The de-Broglie wavelength of electrons striking the cathode to produce...

      Text Solution

      |

    15. Suppose the energy of Ka X-rays of two elements P and Q are 826.2eV an...

      Text Solution

      |

    16. What is the wavelength of a beam of X -rays (in A^o ) which is difted ...

      Text Solution

      |

    17. Light of wavelength lambda from a small 0.5 mW He-Ne laser source is u...

      Text Solution

      |

    18. A plate of mass 20mg is in equilibrium in air due to force exerted by ...

      Text Solution

      |

    19. Moseley's law for K(alpha) photon is given by sqrt(v)=a(Z-b) where a i...

      Text Solution

      |

    20. When photons of energy 4.25eV strike the surface of a metal A, the eje...

      Text Solution

      |