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an argon-ion laser(wavelength is 514.5nm, power is 1W) EMMIT A gaussian tem 00 beam with a...

an argon-ion laser(wavelength is 514.5nm, power is 1W) EMMIT A gaussian tem 00 beam with a minimum spot radium = 2mm, at z=0. What is the amplitude of the eletric field at the center of the beam, (r=0, z=0)? wht is the average of the eletric field amplitude?

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