Find what is the intensity of a laser beam

Reference no: EM13684108

(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).

Reference no: EM13684108

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