Please find the given question answer

Dear student,

ANs-4. Here we will use the following relation 

(1 / λ) = 1.09677 X 10⁷ [(1 / n₁ ²) - (1 / n₂ ²)]

For Balmer series, n₁ = 2 and n₂ = 3, 4, 5.....

The first line will be obtained for n₂ = 3. So we will have

(1 / λ) = 1.09677 X 10⁷ [(1 / 4) - ( 1 / 9)]

Solving for λ, we get 

λ = 6.563 X 10^-7 m

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