In the early days of laser technology, the strength of lasers was measured in terms of power output. Power output is a measure of the amount of energy that a laser beam delivers per unit of time. This measurement is typically expressed in watts, with more powerful lasers having higher wattage ratings.

One of the first lasers ever created, the Ruby laser, had a power output of about one milliwatt. This may seem low by today's standards, but at the time, it was a groundbreaking achievement. As laser technology advanced, scientists and engineers were able to create lasers with higher and higher power outputs, eventually reaching levels in the megawatt range.

Measuring the strength of early lasers was not only important for understanding the capabilities of these devices, but also for ensuring their safety. High-powered lasers can be dangerous if not handled properly, so knowing the power output of a laser was crucial for determining the appropriate safety measures to take.

Today, lasers are used in a wide range of applications, from cutting and welding in manufacturing to medical procedures and even entertainment. The strength of lasers is still measured in terms of power output, but advancements in technology have led to lasers with much higher power ratings than those of the early days.

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Overall, the strength of early lasers was measured in terms of power output, a measurement that is still used today. As laser technology continues to evolve, it will be interesting to see how the power output of lasers changes and what new applications will be developed as a result.

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