Question

An Er:Yag laser beam of spot size A = 5 mm2 impinges on tissue. Let us assume the tissue is mostly holding water. The absorption coefficient for this laser is a = 15000 cm-1. How long does it take to vaporize a disk of tissue of thickness L = 1/c if the laser is running continuously and its power is P = 5 W? 0.17s O 1.7 x 10-55 1.7 x 10-35 1.7 s None of the other answers

Answer 1

2 5 mm? = 5xlo cm? tu Savo 16.05 X swo) looo os x 54 oxhuese go0075348 J 15000 0.0075348 5 ta 3 I 1-7 X10 see ophic (c) is correct