7.8.4: Supplements Last updated Mar 8, 2021 Save as PDF 7.8.3: Problems 7.9: Optics Appendix: What's Behind the Curtain? Page ID33431 ( \newcommand{\kernel}{\mathrm{null}\,}\) https://www.compadre.org/Physlets/op..._worksheet.pdf https://www.compadre.org/Physlets/op..._worksheet.pdf