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1/ λ = R (1/n2f - 1/n2i)

Where

*nf*and

*ni*are integers that can have values

*nf*= 1, 2, 3, . . . , ∞ and

*ni*=

*nf*+ 1,

*nf*+ 2,

*nf*+ 3, . . . , ∞. Which of the following sets of integers give the wavelength of a line in the Balmer series? (Note: more than one answer may be correct)

*ni*= 2

*nf*= 1

*ni*= 6

*nf*= 2

*ni*= 3

*nf*= 1

*ni*= 5

*nf*= 3

*ni*= 9

*nf*= 2