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Beam Laser

Can mirrors reflect a powerful laser beam or do the mirrors get distroyed?

Can an ordinary mirror serve as a defense shield against powerful laser beams? What happens when a powerful laser beam hits the surface of a mirror? Is the beam reflected or is the mirror destroyed?
Typo: destroyed.

depends how good the mirror is and specifically how much of the wavelength of the laser light is reflected, as a percentage. If it reflects 100%, it will be fine. If it reflects less than 100% (and no mirrors are perfect), then it depends. How much energy is in the laser beam? How long does the laser beam shine on the mirror? What is the mirror made of (ordinary mirrors are usually Ag thin film deposited on glass). Ag is the element with the best reflection of visible light. There may be other materials that would be better than Ag for the particular wavelength but it depends on wavelength.

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