# What will be the longest wavelength line in Balmer series of spectrum?

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What will be the longest wavelength line in Balmer series of spectrum

(a) 546 nm

(b) 656 nm

(c) 566 nm

(d) 556nm

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The correct option is : (b) 656 nm

Explanation:

The longest wavelength means the lowest energy. We know that relation for wavelength