Home
Class 12
PHYSICS
For photoelectric emission , tungsten re...

For photoelectric emission , tungsten requires light of `2300 Å`. If light of `1800 Å` wavelength is incident then emission

A

Takes place

B

Don't take place

C

May or may not take place

D

Depends on frequency

Text Solution

Verified by Experts

The correct Answer is:
A

In tungsten , photoemission take place with a light of wavelength `2300 Å`. As emission of electron is inversely proportional to wavelengths smaller then `2300 Å` will cause emission of electrons.
Promotional Banner

Topper's Solved these Questions

  • DUAL NATURE OF RADIATION AND MATTER

    A2Z|Exercise Assertion Reason|14 Videos
  • CURRENT ELECTRICITY

    A2Z|Exercise Section D - Chapter End Test|29 Videos
  • ELECTRIC CHARGE, FIELD & FLUX

    A2Z|Exercise Section D - Chapter End Test|29 Videos

Similar Questions

Explore conceptually related problems

The threshold wavelength for photoelectric emission in tungsten is 2300 Å. What wavelength of light must be used to eject electrons with a maximum energy of 1.5 eV?

The threshold wavelength of tungsten is 2300 Å. If ultra voilet light of wavelength 1800 Å is incident on it, then the maximum kinetic energy of photoelectrons would be

The photoelectric threshold wavelength for a metal is 10,000 Å . When light of wavelength 5461 Å is incident on it, the retarding potential in Millikan's experiment is 1.02 V. Calculate the value of Planck's constant.

In an experiment of photo electric emission for incident light of 4000 A^(0) ,the stopping potentail is 2V .If the wavelength of incident light is made 300 A^(0) , then the stopping potential will be

(a) The work function for the surface of aluminium is 4.2eV. Find potential difference will be required to stop the emission of maximum kinetic energy photoelectrons emitted by light of 1800Å wavelenght? (b) Determine the wavelength of that incident light for which stopping potential will be zero? (h=6.6xx10^(-34))

When a light of wavelength 4000 Å falls on a photoelectric emitter, photoelectrons are liberated. For another emitter, light of wavelength 6000 Å is suficient for photo emission. The work functions of the two emitters are in the ratio of

If I_(0) is the threshold wavelength for photoelectric emission, 1 the wavelength of light falling on the surface of a metal and m is the mass of the electron, then the velocity of ejected electron is given by

When light of wavelength 3000 Å falls on a photosensitive surface (A) photoelectrons are emitted. However, for another photoemitter (B), light of wavelength 6000 Å is required for the emission of photoelectrons. What is the ratio of the work functions of A and B ?

A2Z-DUAL NATURE OF RADIATION AND MATTER-Section D - Chapter End Test
  1. If the threshold wavelength for sodium is 5420 Å, then the work functi...

    Text Solution

    |

  2. The magnitude of saturation photoelectric current depends upon

    Text Solution

    |

  3. For photoelectric emission , tungsten requires light of 2300 Å. If lig...

    Text Solution

    |

  4. The light rays having photons of energy 1.8 eV are falling on a metal ...

    Text Solution

    |

  5. A photon of energy 8 eV is incident on metal surface of threshold fre...

    Text Solution

    |

  6. In the diagram a graph between the intensity of X-rays emitted by a mo...

    Text Solution

    |

  7. The maximum value of stopping potential in the following diagram is

    Text Solution

    |

  8. The variation of wavelength lambda of the K(alpha) line with atomic nu...

    Text Solution

    |

  9. From the figure describing photoelectric effect we may infer correctly...

    Text Solution

    |

  10. When an inert gas is filled in the place vacuum in a photo cell , then

    Text Solution

    |

  11. A photon of 1.7 xx 10^(-13) joules is absorbed by a material under spe...

    Text Solution

    |

  12. The maximum velocity of an electron emitted by light of wavelength lam...

    Text Solution

    |

  13. When a monochromatic point source of light is at a distance of 0.2 m...

    Text Solution

    |

  14. Which of the following has the least value of (q)/(m)?

    Text Solution

    |

  15. When green light is incident on the surface of metal , it emits photo ...

    Text Solution

    |

  16. An electron is moving through a field. It is moving (i) opposite an e...

    Text Solution

    |

  17. The figure shows different graphs between stopping potential (V(0)) an...

    Text Solution

    |

  18. The K(alpha) X - rays arising from a cobalt (z = 27) target have a w...

    Text Solution

    |

  19. Assertion : In the process of photoelectric emission , all the emitted...

    Text Solution

    |

  20. Assertion : Soft and hard X-rays differ in frequency as well as veloci...

    Text Solution

    |