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1.  E শক্তির একটি ফোটনের তরঙ্গদৈর্ঘ্য কত?

  • A. λ = h / c E
  • B. λ = h / c E
  • C. λ = h / c E
  • D. λ = h / c E

Answer: Option B

Explanation:

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