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GaAsP দিয়ে তৈরি PN জংশন থেকে নির্গত আলোর রঙ

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KVS TGT WET (Work Experience Teacher) 8 Jan 2017 Official Paper
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  1. লাল বা হলুদ
  2. দূর অবলোহিত
  3. নিকট অবলোহিত 
  4. অতিবেগুনী

Answer (Detailed Solution Below)

Option 1 : লাল বা হলুদ
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Detailed Solution

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LED: আলো নিঃসৃত ডায়োড

বিশেষ ডায়োড যা ফরওয়ার্ড বায়াস ভোল্টেজের উপর ভিত্তি করে রঙ নির্গত করে।

রঙ সহ LED:

অর্ধপরিবাহী  উপাদান তরঙ্গদৈর্ঘ্য রঙ
       GaAs 850 -950 nm  অবলোহিত 
     GaAsP 630-660 nm  লাল
     GaAsP:N 605-620 nm  হলুদ
       AlGaP 550-570 nm  সবুজ
        SiC 430-505 nm  নীল

সুতরাং সঠিক বিকল্প হল "1"

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Q1.একটি আলোক নিঃসারী ডায়োড (LED) রূপান্তরিত করে:
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