ধরুন, আপনাকে A, B, এবং C তিনটি মাধ্যম দেওয়া হয়েছে, যথাক্রমে 1.47, 1.33 এবং 1.44 প্রতিসরাঙ্ক সহ। A, B এবং C এ আলোর বেগ যথাক্রমে VA, VB এবং VC হলে, নীচের কোনটি সত্য?

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RRB Group D 26 Sept 2022 Shift 2 Official Paper
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  1. VB > Vc > VA
  2. Vc > VB > VA
  3. VA > VC > VB
  4. VA > VB > Vc

Answer (Detailed Solution Below)

Option 1 : VB > Vc > VA
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Detailed Solution

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সঠিক উত্তর হল VB > Vc > VA

 Key Points

  • একটি মাধ্যমের মাধ্যমে আলোর বেগ পরোক্ষভাবে মাধ্যমের প্রতিসরাঙ্কের সমানুপাতিক।
  • অতএব বেগ = \(\mathrm{V}_{\mathrm{A}}:\mathrm{V}_{\mathrm{B}}:\mathrm{V}_{\mathrm{B}}=\frac{1 }{1.47}:\frac{1}{1.33}:\frac{1}{1.44}\\=0.68:0.75:0.69\\=68:75:69\)
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