Home
Class 12
PHYSICS
Photons of frequencies 2.2xx10^(15) Hz a...

Photons of frequencies `2.2xx10^(15) Hz` and `4.6xx10^(15) Hz` are incident on a metal surface. The corresponding stopping potentials were found to be `6.6V` and `16.5V` respectively. Given `e=1.6xx10^(-19) c`, the value of universal planck's constant is

A

`6.6 xx 10^(-34) js`

B

`6.7 xx 10^(-34) js`

C

`6.5 xx 10^(-34) js `

D

`6.8 xx 10^(-34) js`

Text Solution

Verified by Experts

The correct Answer is:
1
`hv=w+eV_(0)`
Promotional Banner

Topper's Solved these Questions

  • DUAL NATURE OF RADIATION AND MATTER

    NARAYNA|Exercise EXERCISE - 3|35 Videos

  • DUAL NATURE OF RADIATION AND MATTER

    NARAYNA|Exercise EXERCISE - 4|25 Videos

  • DUAL NATURE OF RADIATION AND MATTER

    NARAYNA|Exercise EXERCISE - 2 (C.W)|25 Videos

  • CURRENT ELECTRICITY

    NARAYNA|Exercise Level 6|43 Videos

  • DUAL NATURE

    NARAYNA|Exercise LEVEL-II (H.W)|17 Videos

Similar Questions

Explore conceptually related problems

The energy of a photon of frequency 4 xx 10^(15) Hz is ?

The threshold frequency for a certain metal for photoelectric effect is 1.7x10^(15)Hz . When light of frequency 2.2xx10^(15)Hz is incident on the metal surface, the kinetic energy of the emitted photoelectrons is 3.3xx10^(-19)J . What is the value of the Planck's constant ?

A photon of frequency 5 xx 10^(14)Hz is incident on the surface of a metal. What is the energy of the incident photon in eV?

Energy of an quanta of frequency 10^(15) Hz and h = 6.6 xx 10^(-34) J - sec will be

In an experiment on photoelectric effect, the slope of the cut off voltage versus frequency of incident light is found to be 4.12xx10^(-15)Vs . Given e=1.6xx10^(-19)C , estimate the value of Planck's constant.

Radiations of frequencies 8xx10^(15) Hz and 5xx10^(15) Hz are incident one after the another on the same photosensitive surface. If is found that the kinetic energies of the photo electrons emitted from the surface are in the ratio of 2:1 . What is the threshold frequency for the surface ?

If light of frequency 8.2 xx 10^(14) Hz is incident on the metal , cut-off voltage for photoelectric emission is 2.03 V. Find the threshold frequency . Given h = 6.63 xx 10^(-34) Js , e = 1.6 xx 10^(-19) C .

Frequency of a wave is 6 xx 10^(15) Hz. The wave is

Find the frequency of light incident on a metal surface if the photocurrent is brought to zero by a stopping potential of 2.6V . The threshold frequency for the metal surface is 5xx10^(14)//s .

The number of photons in radiation of frequency 2xx10^13 Hz and energy content 6.63 J is

NARAYNA-DUAL NATURE OF RADIATION AND MATTER-EXERCISE - 2 (H.W)
  1. Ultraviolet light of wavelength 300nn and intensity 1.0Wm^-2 falls on ...

    Text Solution

    |

  2. Light rays of wavelength 6000A^(@) and of photon intensity 39.6Wm^-2 i...

    Text Solution

    |

  3. Ligth of wavelength 4000A^(@) is incident on a metal surface of work f...

    Text Solution

    |

  4. A photomental is illuminated by lights of wavelenght lambda(1) and lam...

    Text Solution

    |

  5. U.V. light of wavelength 800A^(@)&700A^(@) falls on hydrogen atoms in ...

    Text Solution

    |

  6. In a photoelectric effect experiment, photons of energy 5eV are incide...

    Text Solution

    |

  7. The number of photons emitted per second by a 62W source of monochroma...

    Text Solution

    |

  8. Photons of frequencies 2.2xx10^(15) Hz and 4.6xx10^(15) Hz are inciden...

    Text Solution

    |

  9. If stopping potentials corresponding to wavelengths 4000A and 4500A ar...

    Text Solution

    |

  10. Photons of energy 2.0eV fall on a metal plate and release photoelectro...

    Text Solution

    |

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

    Text Solution

    |

  12. If the velocity of a particle is increased three times, then the perce...

    Text Solution

    |

  13. If the momentum of electron is changed by P(m) then the de-Broglie wa...

    Text Solution

    |

  14. A proton when accelerated through a p.d of V volt has wavelength lambd...

    Text Solution

    |

  15. If the energy of a particle is reduced to one fourth, then the percent...

    Text Solution

    |

  16. The de Broglie wavelength associated with an electron of velocity 0.3c...

    Text Solution

    |

  17. The uncertainity in the position of a particle is equal to the de-Brog...

    Text Solution

    |

  18. If the uncertainty in the position of proton is 6xx10^-8m, then the mi...

    Text Solution

    |

  19. From Davisson-Germer experiment an alpha particle and a proton are acc...

    Text Solution

    |

  20. If the uncertainity in the position of an electron is 10^(-10) m, then...

    Text Solution

    |