Fnd what is the intensity in wm2 of a laser beam used to


(a) Find what is the intensity in W/m2 of a laser beam used to burn away cancerous tissue that, when 90 percent absorbed, puts 450 Joule of energy into a circular spot 2.70 millimeter in diameter in 4.00 second?

W/m2

(b) Compare this intensity to the average intensity of sunlight (about 1 kW/m2).

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Physics: Fnd what is the intensity in wm2 of a laser beam used to
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