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      Question

      In which year was the Doppler effect discovered by

      Austrian scientist Christian Doppler, that describes the change in frequency of any kind of sound or light wave produced by a moving source with respect to an observer?
      A 1846 Correct Answer Incorrect Answer
      B 1844 Correct Answer Incorrect Answer
      C 1842 Correct Answer Incorrect Answer
      D 1840 Correct Answer Incorrect Answer

      Solution

      The correct answer is C

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