The first emission line of Balmer series for \( \mathrm{H} \)-spectrum has the wave no. equal to...
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0The first emission line of Balmer series for \( \mathrm{H} \)-spectrum has the wave no. equal to:
(A) \( \frac{9 R_{\mathrm{H}}}{400} \mathrm{~cm}^{-1} \)
(B) \( \frac{7 R_{\mathrm{H}}}{144} \mathrm{~cm}^{-1} \)
(C) \( \frac{3 R_{\mathrm{H}}}{4} \mathrm{~cm}^{-1} \)
(D) \( \frac{5 R_{\mathrm{H}}}{36} \mathrm{~cm}^{-1} \)
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