Home
Class 12
PHYSICS
The work function of Na metal is 2.3 eV...

The work function of Na metal is `2.3 eV`, then the threshold wavelength lies in the following region of EM spectrum -

A

Ultraviolet

B

X-ray

C

Violet

D

Yellow

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • MATTER WAVE

    MOTION|Exercise EXERCISE 3 (SECTION B)|7 Videos

  • MODERN PHYSICS - 2

    MOTION|Exercise EXERCISE - 4 (Level -II) PREVIOUS YEAR - JEE ADVANCED|28 Videos

Similar Questions

Explore conceptually related problems

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

The work function of sodium is 2.3 eV . The threshold wavelength of sodium will be

Work funciton of a metal is 2.51eV. It threshold frequency is

The work function for a metal whose threshold wavelength is 5000 Å is

The work function of a metal is 2.5eV . A monochromatic ligth of wavelength 300 Å falls on it

The work function of cesium is 2.14 eV. The threshold freqency of caesium is

A metal is irradiated with light of wavelength 660 nm. Given that the work function of the metal is 1.0eV, the de Broglie wavelength of the ejected electron is close to-

If the photoelectric work function of a metal is 5 eV , the threshold frequency of the metal is

MOTION-MODERN PHYSICS-PHYSICS
  1. In a photoelectron experiment , the stopping potential for the photoel...

    Text Solution

    |

  2. If 5% of the energy supplied to a bulb is irradiated as visible light,...

    Text Solution

    |

  3. The work function of Na metal is 2.3 eV, then the threshold wavelengt...

    Text Solution

    |

  4. The patient is asked to drink BaSO(4) for examining the stomach by X-r...

    Text Solution

    |

  5. If I(0) and I(a) denote intensities of incident and absorbed X-rays, t...

    Text Solution

    |

  6. Generation of X-rays is a-

    Text Solution

    |

  7. Which one curve is correct-

    Text Solution

    |

  8. In an X-ray tube if the electrons are accelerated through 140KV then a...

    Text Solution

    |

  9. If the frequency of K(alpha), K(beta) and L(alpha) , X-ray lines of a...

    Text Solution

    |

  10. If lambda(K(alpha)), lambda(K(beta)) and lambda(L(alpha)) are the w...

    Text Solution

    |

  11. Following diagram shows relation between emitted X-rays intensity and ...

    Text Solution

    |

  12. If lambda(alpha), lambda(beta) and lambda(gamma) are respectively the...

    Text Solution

    |

  13. 50% of the X-ray coming from a Coolidge tube is able to pase through a...

    Text Solution

    |

  14. The ionisation energies of K-shell for cobalt, copper, and molebdenum ...

    Text Solution

    |

  15. Electrons with energy 80 keV are incident on the tungsten target of an...

    Text Solution

    |

  16. Energies required to knock the electrons out of the various shells of ...

    Text Solution

    |

  17. The atom of a heavy fissionable element hit by a neutron of sufficient...

    Text Solution

    |

  18. The binding energies of the atom of elements P and Q are E(P) and E(Q)...

    Text Solution

    |

  19. A radioactive isotope has a decay constant lambda and a molar mass M. ...

    Text Solution

    |

  20. The passage of gamma -rays photons through materials sometimes results...

    Text Solution

    |