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      Question

      Which of the following transitions in hydrogen atom

      will result in emission of radiation of longest wavelength?
      A n = 3 to n = 1 Correct Answer Incorrect Answer
      B n = 2 to n = 1 Correct Answer Incorrect Answer
      C n = 4 to n = 2 Correct Answer Incorrect Answer
      D n = 5 to n = 4 Correct Answer Incorrect Answer

      Solution

      The wavelength of the emitted radiation during a transition in a hydrogen atom is given by the Rydberg formula: where: wavelength. Therefore, the transition n = 5 to n = 4 will result in the emission of radiation of the longest wavelength.

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