Which of the following is the longest wavelength of radiation for the Paschen series?
Correct answer: C. 0.00000187 m
- A. 187000000 m
- B. 187000000/ m
- C. 0.00000187 m
- D. 0.00000187 / m
Explanation
Given the options provided, 0.00000187 m (which is 1.87 µm) represents the longest wavelength of radiation in the Paschen series. The other option, 187000000 m, is an exceedingly large wavelength that is not applicable to the Paschen series or any other typical electromagnetic radiation observed in atomic transitions.
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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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