(b) A periodic square wave (for example, a diffraction grating, electron density in a 1D crystal) can be represented as a convolution between a square pulse and an array of ô functions as shown below....

3

Extracted text: (b) A periodic square wave (for example, a diffraction grating, electron density in a 1D crystal) can be represented as a convolution between a square pulse and an array of ô functions as shown below. 2/2 2=2r/Ko Using Convolution theorem, establish the link between Fourier series and Fourier transform for the above case.