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

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

A

wave length

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 take place no matter how intence the light is.
Promotional Banner

Topper's Solved these Questions

  • MOCK TEST

    A2Z|Exercise Mock Test 2|45 Videos

  • MOCK TEST

    A2Z|Exercise Mock Test 3|44 Videos

  • MAGNETISM AND MATTER

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

  • NUCLEAR PHYSICS

    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-MOCK TEST-Mock Test 3
  1. Photoelectric emission occurs only when the incident light has more th...

    Text Solution

    |

  2. The point charges + q, 2q and + q are placed at point (x = 0, y = a, z...

    Text Solution

    |

  3. A long straight wire of radius a carries a steady current i. The curre...

    Text Solution

    |

  4. If in a p-n junction diode , a square input single of 10 V is applied...

    Text Solution

    |

  5. A hollow cylinder has a charge q C within it. If phi is the electric f...

    Text Solution

    |

  6. Starting with a sample of pure .^66Cu, 3/4 of it decays into Zn in 15 ...

    Text Solution

    |

  7. In a mass spectrometer used for measuring the masses of ions, the ions...

    Text Solution

    |

  8. Two sources of equal emf are connected to an external resistance R. Th...

    Text Solution

    |

  9. Two point white dots are 1mm apart on a black paper. They are viewed b...

    Text Solution

    |

  10. A thin glass (refractive index 1.5) lens has optical power of -5D in a...

    Text Solution

    |

  11. A fish looking up through the water sees the outside world contained i...

    Text Solution

    |

  12. Two concentric coils each of radius equal to 2 pi cm are placed at rig...

    Text Solution

    |

  13. The input resistance of a common emitter transistor amplifer, if the o...

    Text Solution

    |

  14. In the figure shown, the capacity of the consider C is 2 nu F. The cur...

    Text Solution

    |

  15. When the key E is pressed at time t = 0, which of the following statem...

    Text Solution

    |

  16. An ac source of angular frequency omega is fed across a resistor R and...

    Text Solution

    |

  17. A radioactive material decays by simulataneous emission of two particl...

    Text Solution

    |

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

    Text Solution

    |

  19. A prism is made up of material of refractive index sart3. The angle of...

    Text Solution

    |

  20. The half-life of a radioactive substance is 10 days. This means that

    Text Solution

    |

  21. Three plates of common surface area A are connected as shown. The effe...

    Text Solution

    |