In our discussion of separation of variables, we're going to be making use of several different families of special functions, for different purposes. your job is to write a short essay that explains how to do fourier analysis to describe functions in 1- in particular, your essay must explain fourier methods to someone who has no sianificant mathematical backaround. imagine sitting down and talking to (perhaps) a family member without much math background. you'll need to draw analogies and make sketches, etc. your essay must address both orthogonality and also completeness.

Glass is transparent to visibile light under normal conditions; however, at extremely high intensities, glass will absorb most of the light incident upon it. this works through a process known as multiphoton absorption. in this process, several photons are absorbed at the same time. if very intense light whose photons carry 2ev of energy is shined onto a material with a band gap of 4ev, that light can be absorbed through two-photon absorption, because two photons have the right amount of energy to bridge the band gap. what is the minimum number of photons of 800-nm light that are needed to equal or exceed the band gap of fused silica glass

When is a current produced? when the terminals of an electrochemical cell are connected by a wire if the electric circuit is opened in an electrochemical cell if the electrolyte is removed from an electrochemical cell when the electrodes are reversed in an electrochemical cell

What does si stand for,when referring to a system of measurement