For gaining an atomic spectrum, an evacuated glass tube is filled with:
Correct answer: B. Hydrogen
- A. Neon
- B. Hydrogen
- C. Carbon dioxide
- D. Sulphur dioxide
Explanation
For gaining atomic spectra, the evacuated glass tube is filled with hydrogen gas.
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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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