Home
Class 12
PHYSICS
K(1) and K(2) are the maximum kinetic en...

`K_(1)` and `K_(2)` are the maximum kinetic energies of the photo electrons emitted when light of wave lengths `lamda_(1)` , and `lamda_(2)`, respectively are incident on a metallic surface. If `lamda_(1)=3lamda_(2)` then

A

`K_(1)gt(K_(2))/(3)`

B

`K_(1)lt(K_(2))/(3)`

C

`K_(1)gt3K_(2)`

D

`K_(2)=3K_(1)`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • DUAL NATURE OF RADIATION AND MATTER

    AAKASH SERIES|Exercise PRACTICE EXERCISEX|44 Videos

  • DUAL NATURE OF RADIATION AND MATTER

    AAKASH SERIES|Exercise EXERCISE-I ASSERTION AND REASON|4 Videos

  • CURRENT ELECTRICITY

    AAKASH SERIES|Exercise EXERCISE - III|73 Videos

  • ELECTRIC CHARGES AND FIELDS

    AAKASH SERIES|Exercise Practice Exercise|57 Videos

Similar Questions

Explore conceptually related problems

Photoelectric emission is observed from a metallic surface for frequencies v_(1) and v_(2) of the incident light rays (v_(1)gtv_(2)) .If the maximum value of kinetic energy of the photoelectrons emitted in the two cases are in the ratio 1:k,then the threshold frequency of the metallic surface is

Photoelectric emission is observed from a metallic surface for frequencies v_(1) and v_(2) of the incident light (v_(1)gtv_(2)) .If the maximum values of kinetic energy of the photoelectrons emitted in the two cases are in the ratio 1:n, then the threshold frequency of the metallic surface is

The K.E of the electron is E when the incident wavelength is lamda . To increase the K.E of the electron to 2E, the incident wavelength must be

If lamda_(1)andlamda_(2) are the wavelength of the photons emitted, when electrons in the n^(th) orbit of hydrogen atom fall to first excited state and ground state respectively, then the value of n is

AAKASH SERIES-DUAL NATURE OF RADIATION AND MATTER-EXERCISE=II
  1. Photo electric emission is observed from a metallic surface for freque...

    Text Solution

    |

  2. When radiation of the wavelength lamdais incident on a metallic surfac...

    Text Solution

    |

  3. K(1) and K(2) are the maximum kinetic energies of the photo electrons ...

    Text Solution

    |

  4. Light of frequency 1.5 times the threshold frequency is incident on a ...

    Text Solution

    |

  5. The maximum wavelength of a beam of light can be used to produce photo...

    Text Solution

    |

  6. The work function of a material is 5.3 eV and the stopping potential f...

    Text Solution

    |

  7. The energy flux of sunlight reaching the surface of the earth is 1.388...

    Text Solution

    |

  8. The threshold frequency for a certain metal is v(0). When a certain ra...

    Text Solution

    |

  9. The work function of a certain metal is 3.31xx10^-(-19) jthen, the max...

    Text Solution

    |

  10. A photon of energy .E. ejects a photoelectron from a metal surface who...

    Text Solution

    |

  11. The surface of a metal is illuminated with the ight of 400nm. The kine...

    Text Solution

    |

  12. The ratio of velocities of a proton and an alpha particle is 4 : 1. Th...

    Text Solution

    |

  13. Which of the following figures represents the variation of particle mo...

    Text Solution

    |

  14. The wavelength of an electron of energy 100 eV will be

    Text Solution

    |

  15. If the kinetic energy of a particle is increased four times, then the ...

    Text Solution

    |

  16. A particle is projected horizontally with a velocity 10m/s. What will ...

    Text Solution

    |

  17. A positron and a proton are accelerated by the same accelerating poten...

    Text Solution

    |

  18. The cut-off wavelength when a potential difference of 25 KV is applied...

    Text Solution

    |

  19. The wavelength of x-rays is of the order of

    Text Solution

    |

  20. The energy of an x-ray photon is 4 kev. Its frequency is nearly

    Text Solution

    |