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  • Question
  • A gas absorbs a photon of 355 nm and emits at two wavelengths. If one of the emissions is at 680 nm, the other is at :


  • Options
  • A. 518 nm
  • B. 1035 nm
  • C. 325 nm
  • D. 743 nm

  • Correct Answer
  • 743 nm 

    Explanation

    1 ? = 1 ? 1 + 1 ? 2

    1 355 = 1 680 + 1 ? 2

    1 ? 2 = 680 - 355 680 × 355

    ? ? 2 = 743 n m .

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