LASER is a device which can produce:
Correct answer: C. Intense, Coherent, Monochromatic beam of light
- A. Intense beam of light
- B. Coherent beam of light
- C. Intense, Coherent, Monochromatic beam of light
- D. Monochromatic beam of light
Explanation
Explanation:LASER (Light Amplification by Stimulated Emission of Radiation) is a device that produces a beam of light through the process of stimulated emission. The light produced by a laser is intense because all the photons in the beam are in phase and coherent, meaning that they have the same wavelength, frequency, and direction of propagation. Additionally, the light is monochromatic, meaning that it consists of a single color or wavelength. LASER can produce an intense beam of light by amplifying light waves using stimulated emission.LASER produces a coherent beam of light where all the light waves have the same frequency and are in phase with each other. LASER also produces a monochromatic beam of light with a single frequency and color.
This question appeared on the UHS MDCAT 2009 paper, which you can sit online with every answer explained.
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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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