Home
Class 12
PHYSICS
Energy of a light photon E of wavelength...

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-

A

1.02 eV

B

2.07 eV

C

6.3 eV

D

12.4 eV

Text Solution

Verified by Experts

The correct Answer is:
2
`E=(hc)/lamda=12400/6000eV=2.07eV`
Promotional Banner

Topper's Solved these Questions

  • MOCK TEST 3

    CAREER POINT|Exercise CHEMISTRY|30 Videos

  • MOCK TEST 2

    CAREER POINT|Exercise PART (B)-CHEMISTRY|29 Videos

  • MOCK TEST 4

    CAREER POINT|Exercise CHEMISTRY|30 Videos

Similar Questions

Explore conceptually related problems

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

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

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.

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 .

The reverse-biased current of a particular p-n junction diode increases when it is expoesed to light of wavelength less than or equal to 600nm.Assume that the increases in carrier concentration takes place due to the creation of new hole-electron pairs by the light.Find the band gap.

A P-N junction becomes active as photons of wavelength, lambda=400 nm falls on it. Find the energy band gap?

The K_beta X-ray of argon has a wavelength of 0.36 nm. The minimum energy needed to ironize an argon atom is 16 eV. Find the energy needed to knock out an electron from the K shell of an argon atom.

Surface of certain metal is first illuminated with light of wavelength lambda_(1)=350 nm and then, by light of wavelength lambda_(2)=540 nm. It is found that the maximum speed of the photo electrons in the two cases differ by a factor of 2. The work function of the metal (in eV) is close to : (Energy of photon =(1240)/(lambda("in nm"))Ev

Electrons with a kinetici energy of 6.023xx10^(4)J//mol are evolved from the surface of a metal, when it is exposed to radiation of wavelength of 600 nm. The minimum amount of energy required to remove an electron fro the metal atom is:

" The cut-off wavelength for a photon able to create electron-hole pair in a semiconductor having energy band gap of "1.6eV" is "

CAREER POINT-MOCK TEST 3-CHEMISTRY
  1. Energy of a light photon E of wavelengthlamda=600nm is equal to the ba...

    Text Solution

    |

  2. The hybridization states of the nitrogen atom in pyridine, piperdine a...

    Text Solution

    |

  3. A sample of Ammonium phosphate (NH(4))(3)PO(4) contains 3.18 moles of ...

    Text Solution

    |

  4. Which of the folowing staements is not correct?

    Text Solution

    |

  5. Polarisation is the distortion of the shape of the shape of an anion b...

    Text Solution

    |

  6. The de-Brogile wavelength of a neutron at 927^(@)C is lamda. What will...

    Text Solution

    |

  7. In a closed flask of 5 litre, 1.0 g of H(2) is heated from 300-600K. W...

    Text Solution

    |

  8. Assume that the decomposition of HNO(3) can be represented by the foll...

    Text Solution

    |

  9. Which of the following is a buffer solution ?

    Text Solution

    |

  10. A gaseous system undergo a change of state from (1) to (2) by any of t...

    Text Solution

    |

  11. The empty space between the shaded baals and holow balls and hollow ba...

    Text Solution

    |

  12. What will be the temperature at which a solution containing 6 g of glu...

    Text Solution

    |

  13. In a Cu-voltameter, mass deposited in 30 s is m gm. If the time-curren...

    Text Solution

    |

  14. Plotting a graph of log t(1//2) against log [A](0) of a rectant for a ...

    Text Solution

    |

  15. The rate of disappearence of SO(2) in the reaction 2SO(2)+O(2)to2SO(...

    Text Solution

    |

  16. Which of the following compound have 1^(@),2^(@), 3^(@) and 4^(@)C pre...

    Text Solution

    |

  17. Relate the following compounds

    Text Solution

    |

  18. Which has maximum b,p and m,p out of :

    Text Solution

    |

  19. Action of heat on a mixture of sodium propionate and sodalime produces...

    Text Solution

    |

  20. In which case racemisation takes place ?

    Text Solution

    |

  21. Which of the following molecule do not give Br(2)/Water test

    Text Solution

    |