Wavelength of the first line of Paschen series is − R=109700 cm−1

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18750Ao

2854Ao

3452Ao

6243Ao

answer is A.

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Detailed Solution

ν¯ =1λ=R1n12-1n22 First line of paschen is 4(n2)→3 (n1) ν¯ =1λ=10970019-116 λ =18752×10-8cm ≈18750Ao

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