Teaching NVS PGT 2024 Test Series Physics Electromagnetic Waves Electromagnetic Spectrum

If λ1 and λ2 and 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 ∶ 108
2
7 ∶ 135
3
1 ∶ 3
4
1 ∶ 9
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