The radiations emitted form hydrogen filled discharge tube show____________?
Correct answer: B. line spectrum
- A. band spectrum
- B. line spectrum
- C. continuous spectrum
- D. absorption spectrum
Explanation
Hydrogen atoms have quantized energy levels, so emitted photons have only specific energies and wavelengths. These wavelengths appear as separate bright lines, forming a line spectrum rather than a continuous or band spectrum. The likely mistake is choosing a band spectrum, which is more typical of molecules with many closely spaced energy levels.
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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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