The longest wavelength in Balmer series of Hydrogen is:
Correct answer: B. 6563 Ao
- A. 8000 Ao
- B. 6563 Ao
- C. 1900 Ao
- D. None of the above
Explanation
For longest wavelength in the Balmer series, the transition takes place from n=3 to n=2.Longest wavelength 1/λ = 1.097 x 107 x(1/22- 1/32)1/λ = 1.097 x 107 x(5/36)λ = 6.563 X 107 = 6563 A°(The angstrom is a metric unit of length equal to 10⁻¹⁰ m)
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About Atomic Spectra
Atoms emit or absorb light at specific wavelengths because electrons occupy quantized energy levels and change levels by absorbing or releasing photons. The topic covers emission and absorption spectra, spectral series, hydrogen’s line spectrum, energy-level transitions, and the relation between wavelength, frequency and photon energy.
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