Home
Class 12
PHYSICS
The energy of a photon of sodium light (...

The energy of a photon of sodium light `(lambda=589 nm)`equal the band gap of a semiconducting material.(a)Find the minimum energy E requried to create a hole-electron pair.(b)Find the value of `E//kT`at a temperature of 300K.

Text Solution

Verified by Experts

`E/(kT)=(2.1 times 1.6 times 10^(-19)J)/(1.38 times 10^(-23) times 300) =81`
Promotional Banner

Topper's Solved these Questions

  • ELECTRONICS - SEMI CONDUCTOR

    MOTION|Exercise GOLDEN KEY POINTS|6 Videos

  • ELECTRONICS - SEMI CONDUCTOR

    MOTION|Exercise ADVANTAGES OF SEMICONDUCTOR DEVICES OVER VACCUM TUBES|3 Videos

  • ELECTROMAGNETISM

    MOTION|Exercise Exercise|136 Videos

  • ELECTROSTATICS

    MOTION|Exercise Exercise -3 Section (B) Previous Year Problems | JEE Main|30 Videos

Similar Questions

Explore conceptually related problems

The energy of a photon of sodium light wavelength 5890 Å equals the energy gap of a semiconducting material. Find the minimum energy E required to create a hole-electron combination. the value of E//kT at a temperature of 27^(@)C , where k=8.62xx10^(-5) eV//K, h=6.63xx10^(-34)Js .

If the energy of a photon of sodium light ( lambda =589 nm) equals the band gap of semiconductor, the minimum energy required to create hole electron pair

Energy of a light photon E of wavelength lamda=600 nm is equal to the band gap of the given semiconducter. The minimum enrgy needed to create an electron-hole pair is-

Energy of an electramagnetic radiation of wavelenght 590 nm equals the band gap of a semiconductor calculate the minimum energy required to create an electron hole pair

Find the wavelength of light that may excite an electron in the valence band of diamond to the conduction band. The energy gap is 5.50 eV

The wavelenths gamma of a photon and the de-Broglie wavelength of an electron have the same value.Find the ratio of energy of photon to the kinetic energy of electron in terms of mass m, speed of light and planck constatn

The rate of reaction ((dx)/(dt)) varies with nature, physical state and concentration of reactants, temperature, exposure to light and catalyst, whereas rate constant (K) varies with temperature and catalyst only. The rate constant K is given as K=Ae^(-E_(a)//RT) where A is Arrhenius parameter or pre-exponential factor and E_(a) is energy of activation. The minimum energy required for a reaction is called threshold energy and the additional energy required by reactant molecules to attain threshold energy level is called energy of activation. At what conditions exponential factor is zero a reaction?

Consider a situation in which reverse biased current of a particular P-N junction increases when it is exposed to a light of wavelength le 621 nm. During this process, enhancement in carrier concentration takes place due to generation of hole-electron pairs. The value of band gap is nearly.

MOTION-ELECTRONICS - SEMI CONDUCTOR-EXERCISE - 3
  1. The energy of a photon of sodium light (lambda=589 nm)equal the band g...

    Text Solution

    |

  2. If temperature increases, conductivity of semiconductor will be –

    Text Solution

    |

  3. At 0K, silicon behave as –

    Text Solution

    |

  4. The energy band gap is maximum in –

    Text Solution

    |

  5. The part of a transistor which is most heavily doped to produce large ...

    Text Solution

    |

  6. In the middle of the depletion layer of a reverse - biased p - n junc...

    Text Solution

    |

  7. The difference in the variation of resistance with temperature in a me...

    Text Solution

    |

  8. A strip of copper and another of germanium are cooled from room tempe...

    Text Solution

    |

  9. When npn transistor is used as an amplifler

    Text Solution

    |

  10. A piece of copper and another of germanium are cooled from room temper...

    Text Solution

    |

  11. The manifestation of band structure in solids is due to

    Text Solution

    |

  12. When p-n junction diode is forward biased then

    Text Solution

    |

  13. The electrical conductivity of a semiconductor increases when electrom...

    Text Solution

    |

  14. In a full wave rectifier circuit operating from 50 Hz mains frequency ...

    Text Solution

    |

  15. In a common-base amplifier, the phase difference between the input sig...

    Text Solution

    |

  16. If the ratio of the concentration of electron to that of holes in a se...

    Text Solution

    |

  17. A solid which is not transperent to visible light and whose conductivi...

    Text Solution

    |

  18. In a common base mode of transistor, collector current is 5.488 mA for...

    Text Solution

    |

  19. If the lattice constant of this semiconductor is decreased, then which...

    Text Solution

    |

  20. In the following, which one of the diodes is reverse biased –

    Text Solution

    |

  21. The circuit has two oppositely connected ideal diodes in parallel. Wha...

    Text Solution

    |