Laser

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Light amplification by stimulated emission of radiation.

Lasers produce a concentrated beam of energy. Many different powers and wavelengths of laser radiation are used for measurement or as a surgical instrument. Their usefulness and their dangers to the operator, bystanders and patient are more subtle than those of a knife.

Laser injuries particularly to the eye may arise in warfare or industry. Eye injuries by powerful lasers are likely to be total in less time than the blink reflex.

Types of laser

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