Q.
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
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a
0.25×107 m-1
b
2.5×107 m-1
c
0.025×104 m-1
d
0.5×107 m-1
answer is A.
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Detailed Solution
Here, R=107 m-1The wave number of the last line of the Balmer series in hydrogen spectrum is given by1λ=R122-1∞2=R4=1074=0.25×107 m-1
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