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How many spectral lines does hydrogen have?

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in Physics – Class 12 by (135k points)
How many spectral lines does hydrogen have?

(a) Four

(b) Three

(c) Two

(d) One

I have been asked this question in an online quiz.

Question is taken from The Line Spectra of the Hydrogen Atom in division Atoms of Physics – Class 12

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Correct answer is (a) Four

To explain I would say: Niels Bohr calculated the energies that a hydrogen atom would have in each of its energy levels, based on the wavelength of the spectral lines. Then he found out that there are four spectral lines for hydrogen, namely, Lyman, Balmer, Paschen, and Brackett series. The Lyman series lies in the UV region, whereas the Balmer series lies in the visible region, and the last two lie in the infrared region.

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