Question

Compute the power densities for the medically realistic situa- tions described below. a. Photocoagulation of the retina using 500-m-diameter spots and a laser power of 200 milliwatts . b. Photovaporization of opacities within the eye using 50 u diameter spots and a laser power setting of 2 watts. Compare these two power densities by computing the ratio between them, and explain why your answer makes physical sense given the uses to which the lasers are applied. c.

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