The maximum wavelength in the Brackett series is given by:
Correct answer: D. Option D
- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation
The Brackett series gets its longest wavelength from the smallest energy jump, which happens when an electron moves from level 5 down to level 4. Putting these values into the Rydberg equation gives a fraction of 9/400, so the wavelength comes out as 400 divided by 9Rₕ.
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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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