Home
Class 12
PHYSICS
Photoelectric emission occurs only when ...

Photoelectric emission occurs only when the incident light has more than a certain minimum

A

wavelength

B

frequency

C

amplitude

D

angle of incidence

Text Solution

Verified by Experts

The correct Answer is:
B
In photoelectric effect for a given photosensitive material , there exists a certain minimum cut - off frequency , called the threshold frequency , below which no emission of photoelectrons takes place no matter how intense the light is.
Promotional Banner

Topper's Solved these Questions

  • DUAL NATURE OF RADIATION AND MATTER

    A2Z|Exercise Assertion Reason|14 Videos

  • DUAL NATURE OF RADIATION AND MATTER

    A2Z|Exercise Section D - Chapter End Test|30 Videos

  • DUAL NATURE OF RADIATION AND MATTER

    A2Z|Exercise AIPMT/NEET Questions|46 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

In photoelectric effect, the electrons are ejected from metals if the incident light has a certain minimum.

The photoelectric emission from a surface starts only when the light incident upon the surface has certain minimum:

A certain element 'A' undergoes photoelectric emission when bombarded by one photon of indigo light. When the material containing the same element was bombarded by two photons of red light with a total of same energy as that of indigo photon, no electron was emitted. Explain.

Does the stopping potential in photoelectric emission depend upon the intensity of the incident radiation in a photo cell? Comment on it.

Derive de Broglie wave equation for material particles. (b) Why does photoelectric emission not take place if the frequency of incident radiation is less than threshold frequency ?

In a photoelectric experiment increasing the intensity of incident light

A2Z-DUAL NATURE OF RADIATION AND MATTER-AIIMS Questions
  1. We wish to see inside an atom. Assuming the atom to have a diameter of...

    Text Solution

    |

  2. Solid targets of different elements are bombarded by highly energetic ...

    Text Solution

    |

  3. The radiation pressure exerted by an EM wave of intensity I on a black...

    Text Solution

    |

  4. Hard X -rays for the study of fractures in bones should have a minimum...

    Text Solution

    |

  5. Photoelectric emission occurs only when the incident light has more th...

    Text Solution

    |

  6. If alpha,beta and gamma rays carry same momentum, which has the longes...

    Text Solution

    |

  7. Flash light equipped with a new set of batteries, produces bright whit...

    Text Solution

    |

  8. Radiation of wavelength lambda in indent on a photocell . The fastest ...

    Text Solution

    |

  9. Penetrating power of X - rays depends on

    Text Solution

    |

  10. Ultraviolet light of wavelength 300nn and intensity 1.0Wm^-2 falls on ...

    Text Solution

    |

  11. The frequency of incident light falling on a photosensitive metal plat...

    Text Solution

    |

  12. The potential difference applied to an X-ray tube is 5k V and the curr...

    Text Solution

    |

  13. According to Einstein's photoelectric equation, the plot of the maximu...

    Text Solution

    |

  14. The wavelength of K(alpha) line for an element of atomic number 43 is ...

    Text Solution

    |

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

    Text Solution

    |

  16. The de - Broglie wavelength of a particle moving with a velocity 2.25 ...

    Text Solution

    |

  17. A photo cell is receiving light from a source placed at a distance of ...

    Text Solution

    |

  18. Light of wavelength lambda strikes a photo - sensitive surface and ele...

    Text Solution

    |

  19. Two identical metal plates show photoelectric effect by a light of wav...

    Text Solution

    |

  20. Find the minimum wavelngth of X - ray emitted by X - ray tube , which...

    Text Solution

    |