When white light is passed through cool gases, the spectra we observe are called _.
Correct answer: C. Absorption line spectra
- A. Line spectra
- B. Continuous spectra
- C. Absorption line spectra
- D. Emission line spectra
Explanation
Option C is correct since absorption line spectra occur when passing white light through cool, thin gas. Option A is incorrect since line spectra is a dark or bright line in an otherwise uniform and continuous spectrum.Option B is incorrect since continuous spectra arise from dense gases or solid objects which radiate heat. Option D is incorrect since emission line spectra are a range of frequencies of electromagnetic radiation.
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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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