This book, *The Feynman Lectures on Physics 3 – Quantum Mechanics*, belongs to the three-volume series by Nobel prize winner Richard P. Feynman and coworkers. It started with a lecture series Feynman gave at Caltech and has since been edited. The notable thing about this book is that it is fairly accessible for non-physicists – much more than most other quantum physics books. We review the classic edition (Third printing, 1966), there is however an updated Millenium edition.

Images in the book are black and white only, but there are a lot of them, which greatly helps the understanding. The book has around 350 pages with nearly A4 size. For most people, this is the perfect beginner book. Only if you don’t want to see any formulas, you may want to choose a book that is written more with the non-scientist reader in mind. Physics students, on the other hand, may complain that there are no exercises in the book. There is however a complete exercise book in addition to the three volume series. Anyway, *The Feynman Lectures on Physics 3 – Quantum Mechanics* is certainly a fantastic book. Now let’s have a look at the individual categories that we review for quantum physics books.

## Motivation for quantum physics

The book directly starts with the particle-wave duality. Already in the very first pages it becomes clear, that classical physics is not enough to describe electrons and photons. The strong motivation for quantum mechanics continues with thought experiments around the double slit experiment. Then the book explains the uncertainty principle. The second chapter explains the relation between wave and particle viewpoints. Among other things, it introduces energy quantization, another big point in demonstrating quantum physics over classical physics. Altogether, *The Feynman Lectures on Physics 3 – Quantum Mechanics *does a fantastic job in motivating quantum physics already during the first 20 pages, and we can thus award 5 stars for this category.

## Images

The images in this book strongly enhance the understanding. And there are a lot of them! We counted nearly 200 images on 350 pages, that is more than one image per two pages. According to our review principles, we can therefore award five stars for the images in this book, even though they are not in color but black and white only.

## Formulas

This book is certainly suited for physics students, since it has a lot of formulas. We counted 989 numbered formulas, plus some more displayed formulas without numbers, plus inline formulas. This is clearly enough to not subtract points for having too few formulas.

So how about correctness? Thankfully, we found this site with errata for all different editions of the book. It contains both mistakes in the text and for all kinds of formulas. For our edition, we counted 45 errors among the 989 numbered formulas. Quite some errors, but still less than one per 20 formulas! Thus we do not subtract stars for the number of errata either, but give the whole five stars for formulas. Nevertheless, if you get the book, you may want to spent some minutes correcting mistakes with the ressource mentioned above.

## Quantum Physics Exercises

Unfortunatelly, there are no exercises in the book at all. However, there is an exercise book with exercises for all three volumes of the series. This is great news for physics students. Nevertheless, since *The Feynman Lectures on Physics 3 – Quantum Mechanics* itself does not have any exercises, we have to give the lowest one-star rating for exercises.

## Summary of the Feynman Lectures on Physics 3 – Quantum Mechanics

The* Feynman Lectures on Physics 3 – Quantum Mechanics* is a fantastic book for physics students, but also accessible for non-physicists that do not shy away when seeing formulas. Many images help with the understanding, and for those who need exercises there is an exercise book to the series. The price tag is much lower than for most other quantum physics books that are suitable for studies, so having a look can’t hurt. Alternatively, see our comparison of the best quantum physics books for beginners.

Motivation: | (5 / 5) |

Images: | (5 / 5) |

Formulas: | (5 / 5) |

Exercises: | (1 / 5) |

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