Home
Class 12
PHYSICS
What is photoelectric effect? State it l...

What is photoelectric effect? State it laws?

Text Solution

Verified by Experts

The phenomenon of emission of electrons from a metal surface when light of suitable frequency falls on it is known as photoelectric effect. Laws of photoelectric emission :
1. Photoelectric emission takes place from a metal surface, when frequency of incident light is above its threshold frequency.
2. The photoelectric emission starts as soon as the light is incident on the metal surface.
3. The maximum kinetic energy with which an electron is emitted from a metal surface is independent of the intensity of the light and depends upon its frequency.
4. The number of photoelectrons emitted is independent of the frequency of the incident light and depends only upon its intensity.
Promotional Banner

Topper's Solved these Questions

  • PARTICLE NATURE OF RADIATION

    BETTER CHOICE PUBLICATION|Exercise SHORT ANSWER TYPE QUESTIONS MOST EXPECTED QUESTIONS)|3 Videos

  • PARTICLE NATURE OF RADIATION

    BETTER CHOICE PUBLICATION|Exercise NUMERICAL PROBLEMS |32 Videos

  • PARTICLE NATURE OF RADIATION

    BETTER CHOICE PUBLICATION|Exercise VERY SHORT ANSWER QUESTIONS (MOST EXPECTED QUESTIONS)|6 Videos

  • OPTICAL INSTRUMENTS

    BETTER CHOICE PUBLICATION|Exercise NUMERICALS PROBLEMS |15 Videos

  • POLARISATION OF LIGHT

    BETTER CHOICE PUBLICATION|Exercise Most Expected Questions|4 Videos

Similar Questions

Explore conceptually related problems

What is photoelectric effect? Which metal can cause photoelectric emission with visible light?

What is reflection of light? State the laws of reflection of light.

BETTER CHOICE PUBLICATION-PARTICLE NATURE OF RADIATION-SHORT ANSWER TYPE QUESTIONS
  1. What is photo electric cells? Give its two applications.

    Text Solution

    |

  2. It is harder to remove free electrons from copper than from sodium. Wh...

    Text Solution

    |

  3. Blue light can eject electrons from a Photo-sensitive surface, while ...

    Text Solution

    |

  4. Derive Einstein's' photoelectric equation in terms of frequency.

    Text Solution

    |

  5. State the four laws of photoelectric emission.

    Text Solution

    |

  6. What are Photons? Give its two properties.

    Text Solution

    |

  7. Green light ejects electrons from a certain photosensitive surface, ye...

    Text Solution

    |

  8. Write Einsteins's photoelectric equation.

    Text Solution

    |

  9. What is phtotelecric effect?Explain the effect of increase of intensi...

    Text Solution

    |

  10. Define photoeletjric effect ,work function,stopping potential and thre...

    Text Solution

    |

  11. What are Photons? Give its two properties.

    Text Solution

    |

  12. Derive Einstein's' photoelectric equation in terms of frequency.

    Text Solution

    |

  13. What is photoelectric effect? State it laws?

    Text Solution

    |

  14. What is photoelectric cell? Explain any one of the photoelectric cells...

    Text Solution

    |

  15. What is photoelectric cell?How dies it work ?Give its practical uses.

    Text Solution

    |

  16. What is photoelectric effect?

    Text Solution

    |

  17. Write Einsteins's photoelectric equation.

    Text Solution

    |

  18. State the four laws of photoelectric emission.

    Text Solution

    |

  19. What is photoelectric effect?

    Text Solution

    |

  20. Discuss suitable experiment to study the laws of photoelectric emissio...

    Text Solution

    |