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12th Class Physics Semiconducting Devices Question Bank Semiconducting Devices Conceptual Problems

  • question_answer
    What do the acronyms 'LASER' and ?LED' stand for? Name the factor which determines (i) frequency, and (ii) intensity of light emitted by LED.                                             

    Answer:

                        LASER stands for light amplification by stimulated emission of radiation; LED stands for light emitting diode. (i) The frequency of light emitted by an LED depends on the band gap of the semiconductor used in LED. (ii) The intensity of light depends on the doping level of the semiconductor used.


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