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QNEET-2013-Ph-1514: NEET 2013 Physics - Class 12 NEET-2013-Ph-1514 Solution: Ratio of longest wave lengths corresponding to Lyman and Balmer …

Ratio of longest wave lengths corresponding to Lyman and Balmer series in hydrogen spectrum is 29/7 31/9 27/5 23/3

Multiple Choice Options

  • A 729{7 \over {29}} 29 7 _
  • B 931{9 \over {31}} 31 9 _
  • C 527{5 \over {27}} 27 5 _
  • D 323{3 \over {23}} 23 3 _

Step-by-Step Verified Solution

We see that wavelength of Lyman series, n f = 3, n i = 4 1 _ L = R [ 1 3 2 _ 1 4 2 ] = 7 R 144 We see that wavelength of Balmer series : n f = 2, n i = 3 1 _ B = R [ 1 2 2 _ 1 3 2 ] = 5 R 36 Now ratio of longest wavelengths corresponds to Lyman and Balmer series: _ L _ B = 5 36 _ 144 7 = 5 27

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