4. Be sure to read the hint at the bottom. For the function 1 2² (2πσ2)1/4 40² f(x) = Δk2 = 2π exp answer the following. (a) Show that the normalization f(x) is such that f f(x)|² dx = 1. (b) The standard deviation of x is Ax, defined by Ax² = = x²|f(x)|²dx. Show that Ax = o. Extra hint: you can differentiate the main hint with respect to a or k. (c) Determine g(k) = f(x) e-ikx dx. (d) Show that f|g(k)|² dk = 2, consistent with Parseval's theorem. (e) The standard deviation of k is Ak, defined by 88 k² [g(k)|²³ dk. Find Ak. What is the product Ak Ax? Hint: you may assume the following definite integral: exp(-aa²) exp(±ika) da = a exp 4 4a
4. Be sure to read the hint at the bottom. For the function 1 2² (2πσ2)1/4 40² f(x) = Δk2 = 2π exp answer the following. (a) Show that the normalization f(x) is such that f f(x)|² dx = 1. (b) The standard deviation of x is Ax, defined by Ax² = = x²|f(x)|²dx. Show that Ax = o. Extra hint: you can differentiate the main hint with respect to a or k. (c) Determine g(k) = f(x) e-ikx dx. (d) Show that f|g(k)|² dk = 2, consistent with Parseval's theorem. (e) The standard deviation of k is Ak, defined by 88 k² [g(k)|²³ dk. Find Ak. What is the product Ak Ax? Hint: you may assume the following definite integral: exp(-aa²) exp(±ika) da = a exp 4 4a
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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