Laser is a device which can produce
Correct answer: D. All of above
- A. Intense beam of light
- B. Coherent beam of light
- C. Monochromatic beam of light
- D. All of above
Explanation
Intense beam of light: Lasers produce light beams that are much more intense than those from other light sources, such as light bulbs or LEDs. This is because the light in a laser beam is all concentrated in a very narrow area.Coherent beam of light: In a coherent light beam, all the waves are in phase with each other. This means that the peaks and troughs of the waves all line up, which gives the beam some special properties, such as the ability to be focused to a very small spot. Lasers produce highly coherent light beams.Monochromatic beam of light: A monochromatic light beam consists of only one wavelength of light. Lasers typically produce light of a very narrow range of wavelengths, which is why they appear to be one colour
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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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