The series' fourth volume, '''''Optics''''', was published in 19641954 by [[Academic Press]] after being translated from the German textbook '''''Optik''''' by [[Otto Laporte]] and [[Peter A. Moldauer]]. The book was reviewed by [[Karl Meissner]],<ref name=Meissner>{{Cite journal|last=Meissner|first=K. W.|author-link=Karl Meissner|date=October 1955|title=Optics. Lectures on Theoretical Physics, Vol. IV|url=http://aapt.scitation.org/doi/10.1119/1.1934064|journal=American Journal of Physics|language=en|volume=23|issue=7|pages=477–478|doi=10.1119/1.1934064|bibcode=1955AmJPh..23..477S|issn=0002-9505}}</ref> [[Rudolf Peierls]],<ref name=PeierlsFour>{{Cite journal|last=Peierls|first=R. E.|author-link=Rudolf Peierls|date=November 1955|title=[Book Reviews]|url=https://www.nature.com/articles/176850d0|journal=Nature|language=en|volume=176|issue=4488|pages=850|doi=10.1038/176850d0|bibcode=1955Natur.176..850P|s2cid=4192749|issn=1476-4687|doi-access=free}}</ref> and several others.<ref>{{Cite journal|last=Domenicali|first=C.A.|date=March 1955|title=Optics. Lectures on theoretical physics, Vol. IV|url=https://linkinghub.elsevier.com/retrieve/pii/0016003255908553|journal=Journal of the Franklin Institute|language=en|volume=259|issue=3|pages=265|doi=10.1016/0016-0032(55)90855-3}}</ref><ref>{{Cite journal|date=March 1955|title=Optics: Vol. 5 of Lectures on Theoretical Physics|url=http://physicstoday.scitation.org/doi/10.1063/1.3061948|journal=Physics Today|language=en|volume=8|issue=3|pages=16|doi=10.1063/1.3061948|issn=0031-9228|last1=Sommerfeld|first1=Arnold|last2=Laporte|first2=Otto|last3=Moldauer|first3=Peter A.}}</ref><ref>{{Cite journal|date=14 January 2009|title=Optics: Vol. 5 of Lectures on Theoretical Physics|url=https://physicstoday.scitation.org/doi/abs/10.1063/1.3061948|journal=Physics Today|language=en|volume=8|issue=3|pages=16|doi=10.1063/1.3061948|issn=0031-9228|last1=Sommerfeld|first1=Arnold|last2=Laporte|first2=Otto|last3=Moldauer|first3=Peter A.}}</ref> Max Born wrote in 1952 that the book gives "a very elegant outline" of [[Cherenkov radiation]].<ref>{{harvnb|Born|1952|pages=280}}</ref> In his 1955 review, [[Karl Meissner]] wrote that the book is characteristic of Sommerfeld's lectures, which he summarized as "[c]lear and vivid presentation[s] of the basic ideas" with an "elegance in language and of mathematical developments" and an "emphasis on physics."<ref name=Meissner /> Peierls called the book "a very welcome addition to the literature" in his 1955 review and he praised the book, like the other lectures, for "the use of powerful mathematical techniques" that are "presented and applied without losing sight of the physical ideas behind them."<ref name=PeierlsFour />
