Laser light is monochromatic which means:
Correct answer: B. It consists of one wavelength
- A. It consists of one ray of light
- B. It consists of one wavelength
- C. It consists of carbon monoxide gas
- D. It consists of photons having 1 eV energy
Explanation
Monochromatic light refers to light that has only one wavelength or frequency. In other words, all the photons in monochromatic light have the same energy and travel in the same direction. Laser light is an example of monochromatic light because it is produced by a process called stimulated emission, which produces light waves of a very specific wavelength.
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About Quantum Theory and Radiation
Quantum theory treats electromagnetic radiation as packets of energy called photons, with energy proportional to frequency through E equals hf. The topic covers Planck's hypothesis, photon momentum, the photoelectric effect, threshold frequency, work function and wave particle duality, distinguishing quantised energy exchange from classical continuous radiation.
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