Simplify the following expression involving the complex number i:

\(4i+3i^{2}+2i^{3}+i^{4}\)
-2 + 2\(i\) (DO NOT ACCEPT: 2\(i\) - 2)15) Energy - Short Answer SLAC [slack] scientists recently developed a new technique for probing the electronic structure of solid materials via high harmonic generation, or HHG. In this technique, light is produced via the oscillations of what subatomic particle?