HW1b_soln_ECE 221_F08

# HW1b_soln_ECE 221_F08 - ECE 221 Fall 08 Homework#1...

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ECE 221 Fall 08 Homework #1 September 5, 2008 Due date: September 19, together with HW#2 1. 80 pts Prepare a 1-2 page QUANTITATIVE discussion of the interaction of a specific type of EM radiation with matter. Illustrate it on one example of application. Include the EMW photon energy range in eV; the wavelength (m) and frequency range (Hz) of the given type of radiation. Acharya Lok Microwaves Pepe Matthew Infrared Sakhalkar Advait Visible Shea Colin UV Taghioskouei Mazdak X-ray Zhao Qianyi Pick one 2. 10 pts Determine the non-relativistic deBroglie wavelength of yourself neutron positron λ =h/p; E=p 2 /2m; p =(2mE) 1/2; λ = h / (2mE) 1/2 m=m 0 m e where m 0 rest mass, m e relativistic λ = (h/2m 0 ) 1/2 (1/m e E) 1/2 The answer depends on the energy of the particle. You have to make an assumption.

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3. 10 pts Redo the Example of the “A Nickel’s worth of radiation” (questions 1 and 2 only) for the case of a human body at room temperature. (Use a cylinder for
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## This note was uploaded on 10/05/2008 for the course ECE 221 taught by Professor Marthapardavi-horvath during the Fall '08 term at GWU.

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HW1b_soln_ECE 221_F08 - ECE 221 Fall 08 Homework#1...

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