Atoms And Nuclei Question 424

Question: Every series of hydrogen spectrum has an upper and lower limit in wavelength. The spectral series which has an upper limit of wavelength equal to 18752 Ao, is

Options:

A) Balmer series

B) Lyman series

C) Paschen series

D) Pfund series

Show Answer

Answer:

Correct Answer: C

Solution:

(c) 1λ=R,[1n121n22]
1n121n22=1Rλ =11.097×107×18752×1010 =0.0486=7144. But 132142=7144n1=3 and n2 = 4 (Paschen series)



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