13.07.2015 Views

Mathematical Methods for Physics and Engineering - Matematica.NET

Mathematical Methods for Physics and Engineering - Matematica.NET

Mathematical Methods for Physics and Engineering - Matematica.NET

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

13.4 EXERCISESDetermine the convolution of f with itself <strong>and</strong>, without further integration,deduce its trans<strong>for</strong>m. Deduce that∫ ∞sin 2 ωdω = π,ω 2−∞∫ ∞−∞sin 4 ωω 4 dω = 2π 3 .13.8 Calculate the Fraunhofer spectrum produced by a diffraction grating, uni<strong>for</strong>mlyilluminated by light of wavelength 2π/k, as follows. Consider a grating with 4Nequal strips each of width a <strong>and</strong> alternately opaque <strong>and</strong> transparent. The aperturefunction is then{A <strong>for</strong> (2n +1)a ≤ y ≤ (2n +2)a, −N ≤ n

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!