Which source is associated with a line emission spectra?
Correct answer: B. Neon Street sign
- A. Electric fibre
- B. Neon Street sign
- C. Red traffic light
- D. Sun
Explanation
Neon lighting consists of brightly glowing, electrified glass tubes or bulbs that contain rarefied neon or other gases. Neon lights are a type of cold cathode gas-discharge light. Hence, neon street signs are associated with the line emission spectrum.
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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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