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An industrial laser cutting tool has a peak electric field of 6.0E5 V/m. What is the...

An industrial laser cutting tool has a peak electric field of 6.0E5 V/m. What is the average intensity of the laser?

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Answer #1

The average intensity of an electromagnetic wave is given by

Where, is the speed of light, is the permittivity of free space and is the peak electric field in the wave.

Putting the values in SI units in the equation we get

So, the average intensity of the laser is 4.78E8 W/m^2.

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