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NEET Sample Paper NEET Sample Test Paper-16

  • question_answer
    The ratio of the frequencies of the long wavelength limits of the Lyman and Balmer series of hydrogen is:

    A) 27 : 5                 

    B) 5 : 27

    C)      4 : 1                  

    D) 1 : 4

    Correct Answer: B

    Solution :

                \[\lambda \] (longest) for balmer series\[=(36/5R)\] \[\lambda \] (longest) for Lyman series\[=(4/3R)\] \[\therefore \]Read ratio \[=\frac{4}{3}\times \frac{5}{36}=\frac{5}{27}\] Hence, the correction option is (b).


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