λ1=R(n121−n221)
Here, [n1=2,n2=∞]
Wavelength =λ1=R[221]=4R=4107=0.25×107m−1
Given the value of Rydberg constant is 107m−1, the wave number of the last line of the Balmer series in hydrogen spectrum will be:
Held on 30 Apr 2016 · Verified 9 Jul 2026.
0.025×104m−1
0.5×107m−1
0.25×107m−1
2.5×107m−1
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