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Question

1 \overset{\circ}{A}

তরঙ্গ দৈর্ঘের একবর্ণী রঞ্জন-রশ্মির শক্তি প্রায় :

2 \times 10^{- 15} J

2 \times 10^{- 16} J

2 \times 10^{- 17} J

2 \times 10^{- 18} J

ANS : 1

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