Home
Class 12
PHYSICS
The work function of a substance is 4.0 ...

The work function of a substance is 4.0 eV. The longest wavelength of light that can cause photoelectron emission from this substance is approximately:

A

540 nm

B

400 nm

C

310 nm

D

220 nm

Text Solution

Verified by Experts

The correct Answer is:
C
Threshold wavelength, `lamda_(0)=(hc)/(W_(0))=(12400)/(4)=3100`Å
=310 nm
Promotional Banner

Topper's Solved these Questions

  • ELECTRONS AND PROTONS

    MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS|Exercise MHT CET CORNER|19 Videos

  • ELECTRONS AND PROTONS

    MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS|Exercise Exercise 1|50 Videos

  • ELECTROMAGNETIC INDUCTION

    MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS|Exercise MHT CET CONER|34 Videos

  • ELECTROSTATICS

    MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS|Exercise MHT CET Corner|29 Videos

Similar Questions

Explore conceptually related problems

The work function of a substance is 4.0 eV The longest wavwlength of light that can cause photoelectron emission from this substance is approximately

The work function of a substance is 4.0 eV The longest wavwlength of light that can cause photoelectron emission from this substance is approximately

The work functio of a substance is 4.0 eV . The longest wavelength of light that can cause photoelectron emission form this substance is approximately :

The work function of a substance is 3.68 eV. The longest wavelength of light that can cause photoelectrons emission from this substance is approximately

The work function of a substance is "3.0eV" .The longest wavelength of light that can cause the emission of photoelectrons from this substance is approximately:

The work function of a substance is 1.6 ev. The longest wavelength of light that can produce potoemisson form the substance is

The work function for a metal surface is 2.0 eV. Determine the longest wavelength that will eject photoelectrons from the metal surface.

The work function of lithium is 2.5 eV. what is the maximum wavelength of light that can cause the photoelectric effect in lithium?

MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-ELECTRONS AND PROTONS-Exercise 2
  1. When a surface 1 cm thick is illuminated with light of wavelength lamb...

    Text Solution

    |

  2. In a photoelectric effect measurement, the stoppingg potential for a g...

    Text Solution

    |

  3. The work function of a substance is 4.0 eV. The longest wavelength of ...

    Text Solution

    |

  4. The act of photoelectric effect taking place with a certain photosensi...

    Text Solution

    |

  5. A point source of light is used in a photoelectric effect. If the sour...

    Text Solution

    |

  6. If the frequency of light in a photoelectric experiment is doubled the...

    Text Solution

    |

  7. The cathode of a photoelectric cell is changed such that the work func...

    Text Solution

    |

  8. In a photoelectric experiment, the potential difference V that must be...

    Text Solution

    |

  9. what should be the velocity of an electron so that its momentum becom...

    Text Solution

    |

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

    Text Solution

    |

  11. Cathode rays enter a magnetic field makin oblique angle withh the line...

    Text Solution

    |

  12. The work function for aluminium is 4.125 eV. The cut-off wavelength fo...

    Text Solution

    |

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

    Text Solution

    |

  14. Photon and electron are given same energy (10^(-20) J). Wavelength ass...

    Text Solution

    |

  15. Match column I (fundamental experiment) with column II (its conclusion...

    Text Solution

    |

  16. When a certain metallic surface is illuminated with monochromatic ligh...

    Text Solution

    |

  17. Which of the following figure represents the variation of particle mom...

    Text Solution

    |

  18. Threshold wavelength for lithium metal is 6250 Å. For photo emission, ...

    Text Solution

    |

  19. In a photoelectric experiment the relation between applied potential d...

    Text Solution

    |

  20. Photoelectric effect experiments are performed using three different m...

    Text Solution

    |