How is laser power measured?

laser measured power
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How is laser power measured?

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Laser power is measured in watts – the same watts used to measure the power of light bulbs. A 10 watt laser will appear much brighter than a 10 watt light bulb since the light from the bulb travels in all directions and spreads rapidly, while the light from the laser is concentrated in a beam only a few millimeters in diameter.

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