A laser used in eye surgery emits a 3.60-mJ pulse in 1.00 ns, focused to a spot 45.0 µm in diameter on the retina. (a) Find (in SI units) the power per unit area at the retina. (This quantity is called the irradiance.) _________ W/m2 (b) What energy is delivered per pulse to an area of molecular size (say, a circular area 0.400 nm in diameter)? ___________ J

A laser used in eye surgery emits a 3.60-mJ pulse in 1.00 ns, focused to a spot 45.0 µm in diameter on the retina. (a) Find (in SI units) the power per unit area at the retina. (This quantity is called the irradiance.) _ W/m2 (b) What energy is delivered per pulse to an area of molecular size (say, a circular area 0.400 nm in diameter)? ___ J

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter24: Electromagnetic Waves

Section: Chapter Questions

Problem 53P

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