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The average intensity within the 3.4-mm radius circular spot illuminated by a helium-neon laser pointer is 53.5 W/m².
(a) What is the peak amplitude of the beam's electric field component?
Emax = |0.53
N/C
(b) What is the rms amplitude of the beam's magnetic field component?
Brms = 0.00125
X HT
(c) What is the average output power of the laser?
Pav = 7.77
avg
x mW

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