If the wavelength of the first line of the Balmer series of hydroge...

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If the wavelength of the first line of the Balmer series of hydrogen is \( 6561 \AA \), the wavelength of the second line of the series should be
(a) \( 13122 \AA \)
(b) \( 3280 \AA \)
(c) \( 4860 \AA \)
(d) \( 2187 \AA \)
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