Question

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

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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A.What is the magnitude of the Poynting vector for this
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Express your answer with the appropriate units.
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A laser produces an electromagnetic wave with a maximum electric
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(a) What is the maximum magnetic field strength in the wave? (b)
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An industrial laser is used to burn a hole through a piece of
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(a) the electric field and (b)
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An evil scientist’s laser beam has a power output of 0.250
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(a) If such a laser beam is projected onto a circular spot 3.00
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(b) Find the peak magnetic field strength.
(c) Find the peak electric field strength.

In a plane radio wave the maximum value of the electric field
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What is the maximum value of the electric field in an
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Answer is in V/m

In free space, the electric field intensity ? = 20 cos (ωt-50x)
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Calculate
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(ii) Magnetic Field intensity (?)
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(qα = 3.2 x 10–19 C and mα = 6.64
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An electromagnetic wave in vacuum has an electric field
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