Answered: 03: What is the intensity of a spot…

03: What is the intensity of a spot laser W/m that used for Medical treatments, when 90.0% absorbed, puts 500J of energy into a circular spot 2.00mm in diameter in 4.00s?

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Concept explainers

Wien's displacement law

Students often get confused between Wien's displacement law and Planck's radiation law. Although both are historically related, yet they are conceptually different. Planck's law helps determine the spectrum of a blackbody, while Wien's law determines the relationship between peak wavelength and temperature.

Question

03: What is the intensity of a spot laser W/m? that used for Medical
treatments, when 90.0 % absorbed, puts 500J of energy into a circular spot
2.00mm in diameter in 4.00s?
Ans: 1.95 x10 W/m

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