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MHT CET 2026 (13 May, Shift 1) · Hydrogen Spectrum & Spectral Series

Hydrogen Spectrum & Spectral Series question from MHT CET 2026 (13 May, Shift 1)

Q2MHT CET 2026 · 13 MAY · SHIFT 1Easy

Hydrogen Spectrum & Spectral Series

The ratio of minimum wavelengths of Lyman and Balmer series will be

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Answer: (b)

Minimum wavelength is the series limit ( $n_2 \to \infty$ ): $\frac{1}{\lambda_{min}} = \frac{R}{n_1^2}$ .
Lyman: $\lambda_{min} = \frac{1}{R}$ ; Balmer: $\lambda_{min} = \frac{4}{R}$ .
Ratio $= \frac{1}{4} = 0.25$ .
So the answer is (b) $0.25$ .

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