If λ 1 and λ 2 are the wavelengths of the third member of Lyman and first member of the Paschen…

If λ1 and λ2 are the wavelengths of the third member of Lyman and first member of the Paschen series respectively, then the value of λ1:λ2 is :
  1. 7:135
  2. 1:9
  3. 1:3
  4. 7:108

Solution

1λ1=R112-142

1λ2=R132-142

λ1λ2=19-1161-116=79×15

λ1λ2=7135

Asked in: JEE Main 2021 (26 Feb Shift 1)

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