Physics, asked by alpanapramanik689, 2 months ago

একটি উত্তল লেন্স থেকে 30cm দূরে বস্তু রাখলে
থেকে 30cm দূরে সদবিম্ব গঠিত হয়। লেন্সটির ফোকাস দৈর্ঘ্য হবে

Answers

Answered by gopinandi86

2

Answer:

লেন্সটির ফোকাস দৈর্ঘ্য হবে 60 cm

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