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NEET2018ChemistryStructure of AtomActual

What is the maximum wavelength of line of Balmer series of hydrogen spectrum? (R=1.09 10^7 ~m ⁻¹ )

Options

  1. A400 ~nm
  2. B660 ~nm
  3. C486 ~nm
  4. D434 ~nm

Correct answer

B. 660 ~nm

Step-by-step solution

For maximum wavelength in the Balmer series, n₂=3 and n₁=2 . aligned 1 & =1.09 10^7 1^2 ( 1 2^2 - 1 3^2 ) 1 & =1.09 10^7 1 ( 1 4 - 1 9 ) & =1.09 10^7 1 ( 5 36 ) & = 36 5 1.09 10^7 ~m & =6.60 10⁻⁷ ~m =660 ~nm aligned

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