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Question
A carbon dioxide laser used in surgery emits infrared radiation with a wavelength of $10.6\textrm{ }\mu\textrm{m}$. In $1.00\textrm{ ms}$ this laser raised the temperature of $1.00\textrm{ cm}^3$ of flesh to $100^\circ\textrm{C}$ and evaporated it. (a) How many photons were required? You may assume flesh has the same heat of vaporization as water. (b) What was the minimum power output during the flash?
1. $1.34\times 10^{23}\textrm{ photons}$
2. $2.52\textrm{ MW}$
Solution Video