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The ratio of wavelength of spectral lines H_α and H_β in the Balmer series is x/(20). The value of x is ______.

Asked in JEE Main 8th April 2nd Shift 2023 · Spectral series and wavelengths

Answer: 27

Step-by-step solution

H_α (3→2): (5R)/(36); H_β (4→2): (3R)/(16).

(λ_α)/(λ_β)=(3/16)/(5/36)=(27)/(20)

→ 27

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