a laser emits 1421018 photons per second in a beam


 A laser emits 1.42*1018 photons per second in a beam of light that has a diameter of 1.88 mm and a wavelength of 519.0 nm. Decide each of the following for the electromagnetic wave that constitutes the beam.

a) The average electric field strength

b) The average magnetic field strength

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Physics: a laser emits 1421018 photons per second in a beam
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