Laser light is:
Correct answer: C. Uni-directional
- A. Multi-directional
- B. Bi-directional
- C. Uni-directional
- D. None of these options is correct
Explanation
Uni-directional can refer to a force, a wave, or a current that only flows in one direction. For example, the force of gravity is uni-directional, meaning that it always pulls objects towards the center of the Earth.
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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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