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Who built the first laser? What are the basic characteristics of laser beam?

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  • Theodore Maiman built the first laser in 1960.(Ruby laser)
  • The following are the basic characteristics of laser beam:
    • coherent→ the photons or waves travels in step or in phase c one another.
    • Collimated→ the laser light travels in one direction
    • Monochromatic → One wavelength or colour is in the visible spectrum
    • High intensity
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