In terms of Rydberg's constant R, the wave number of the first Balmer – McqOptions

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1.	In terms of Rydberg's constant R, the wave number of the first Balmer line is [MP PMT 1996]
A.	R
B.	3R
C.	\[\frac{5R}{36}\]
D.	\[\frac{8R}{9}\]
Answer» D. \[\frac{8R}{9}\]

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