I liked 4 out of the 6 pieces, so technically it should be 3.3 stars.
I didn't like some of them probably because I didn't understand them, and to be fair I didn't focus a lot while reading it, it was more of a leisure read.
The gravitational piece was beautiful. It explained big complex ideas with simple analogies that made sense, some of the laws he discussed I knew already but after reading the lecture it all clicked and the picture was more clear.
I didn't like the conservation of energy or quantum mechanics, which makes sense for quantum mechanics because, well. However I actually studied the conservation of energy and liked it, I was excited to get a new perspective on it and to get deeper intuition but the analogies did not make any sense and it all was just too confusing. Which is why I think rather than a book it would've been better if I just read lectures on the topics that interest me.
I still enjoyed the book and I would probably read Feynman again in the future along with my physics courses.

২০২০ সালের বইমেলায় বইটা কেনা। এরপর রেখে দেয়া হয়েছে অনেকটা সময়। বছরের শেষে এসে কিছু ফ্রি টাইম পেয়ে যাওয়াতে সেল্ফ থেকে নিয়ে ধুলো ঝেড়ে বইটা পড়া শুরু করলাম।

ফাইনম্যান লেকচারের সহজ ছয়টি অধ্যায় নিয়ে বইটির সংকলন। আলোচিত হয়েছে বেশ কিছু বিষয়।

পরমাণুর গঠন, পদার্থবিজ্ঞানের সাথে অন্যান্য বিজ্ঞানের সম্পর্ক, বেসিক কিছু ধারণা, শক্তির সংরক্ষণশীলতা নীতি, মহাকর্ষ এবং সবশেষে কোয়ান্টাম তত্ত্বের সার সংক্ষেপ।

শেষ অধ্যায়টা মূলত কোয়ান্টাম তত্ত্বের সাথে অনিশ্চয়তার সূত্র কিভাবে সম্পর্কযুক্ত, সেটি নিয়ে আলোচিত হয়েছে। এই দ্বিচির পরীক্ষার উপর খুব মজার একটা ভিডিও আছে ইউটিউবে। সেই ভিডিওটা দেখার পর ছোটবেলায় আমি "দেড়মাস পাগল আছিলাম!" তাই ভিডিওটার লিংক শেয়ারের লোভ সামলাতে পারছি না।

কোয়ান্টাম তত্ত্বে অনিশ্চয়তা নীতির সম্পর্কের উপর দ্বিচির পরীক্ষার ভিডিও- https://youtu.be/Q1YqgPAtzho

فقط متاسفم که چرا این کتاب را زودتر نخواندم، دوره دبیرستان یا حتی لیسانس. دو فصل فوق العاده خواندنی کتاب از دید من فصل مکانیک کوانتمی و ارتباط فیزیک با علوم دیگر است که بعد از ۵۰ سال و پیشرفت زیست‌شناسی، شیمی و نوروساینس همچنان مباحث مطرح شده فاینمن درست است. این فصل می‌تواند دید خوبی به یک دانشجو (حتی شاید دانش آموز) بدهد که حتی بتواند رشته تخصصی آینده‌ش را تغییر دهد! با این که فصل‌های مربوط به اتم‌ها در حرکت و نظریه گرانش با زبان ساده و جذاب بیان شده‌اند، اما فصل درخشان این کتاب توضیح ساده نظریه کوانتمی ورفتار موج-ذره الکترون‌هاست. اصل عدم قطعیت هایزنبرگ و «تاثیر مشاهده‌گر بر نتیجه آزمایش» با چند آزمایش ساده و قابل فهم بیان می‌شود. خود فاینمن می‌گوید در درس‌های بعدی این بحث را ادامه می‌دهیم، اما متاسفانه قطعه ششم کتاب به پایان رسیده است!

No me ha parecido que las explicaciones fueran extraordinariamente diferentes de las que pueden leerse en otros libros de divulgación. Y el hecho de que sean extractos de sus clases hace que se note la falta de un hilo conductor. De todos modos, el útimo capítulo, “Comportamiento cuántico”, te hace pensar aun estando ya familiarizado con el tema. Es una excelente introducción al célebre experimento de la doble rendija. Y es interesante cómo Feynman cuestiona una y otra vez los principios hasta que ya no queda más remedio que aceptarlos. A diferencia de otos textos divulgativos, es muy preciso en la explicación y delimita muy claramente la frontera entre los hechos y la interpretación/opinión de los mismos.

Biju dzirdējusi, ka gudras idejas mēdzot rasties pastaigu laikā. It kā ticu, bet tomēr līdz galam nē. Tāpēc jo īpaši bija grūti aptvert, ka klausoties ievadlekcijas par fiziku, manā galvā raisījās ne viena vien praktiska doma un reāli pielietojama ideja. Varbūt tāpēc, ka lektors ir KOLOSĀLS? Vai varbūt tāpēc, ka darbinot neierastas smadzeņu daļas, beidzot, beidzot (!) iepriekš noslogotajām bija iespēja izdomāt kādas domas līdz galam.

I love listening to Feynman talk. Something about his joy for knowledge perhaps?

However, a warning here is that this isn't entry level physics (if you don't have a physics background). Expect to rewind, pause, and do some external thinking/study.

It's fairly simple physics ideas (perhaps minus the quantum lecture) explained well from the absolute ground up. Yet, the speed at which things are obvious to Feynman might be different to you and so (especially in this lecture form) it's easy to get lost.

A mostly great intro into a field I have very limited knowledge of, but found some of the experiments in this hard to follow, as well as Feynman’s description of gravitational potential energy. These concepts and experiments would obviously work much better in a classroom environment as opposed to only reading about them, but still got plenty out of this for it to be worth my time.

"Sei Pezzi facili" di Richard Feynman non sono sei pezzi facili. I primi 4 capitoli sono tratti dalle prime 4 lezioni di Feynman, c'è poi un capitolo sulla teoria della gravitazione e uno sul comportamento quantistico. È una digressione introduttiva all'interno di tutta la fisica conosciuta fino ad oggi, o meglio fino alla scrittura del libro. Dai concetti base più semplici dei corsi in fisica classica a quelli più avanzati e complicati della fisica moderna, è un tumultuo. È impossibile avere una idea chiara di tutto ciò che passa in rassegna Feynman in questo libro, ma è un ottimo modo per creare spunti, stimolare e invitare il lettore a leggere di più, incuriosirsi e studiare. Per un fisico o un lettore molto avvezzo alla fisica invece risultano brillanti le analogie o le metafore che inventa per spiegare meccanismi complessi, è uno strumento utilissimo qualora si volesse fare divulgazione o insegnamento della fisica. Inoltre esplica dei collegamenti a volte molto sottili che solo se hai ben chiaro in mente tutte le varie parti della fisica puoi ben accogliere e comprendere.

Ho una nota simpatia verso lo scrittore, concordo fin troppo con la sua visione del mondo, quella che esplica per esempio ne "Il senso delle cose", quindi potrei essere un po' di parte.

This is just 6 of the Feynman Lectures (available for free online) that are the most accessible.

It's definitely good for its intended audience and comes with Feynman's indelible sense of wonder.

Finishing this compels you to read the rest.

I am in a quandary as how to rate/review this book. Science/math were never my strong suit so I thought I would take a chance to delve into Physics in order to fill a hole in my education. Well, unlike Feynman's students at Cal Tech whom he lectured to, I don't possess a background for expansion so in many ways this was like learning a foreign language for me. I came away with some new terms, interesting ways of looking at the world, and a realization that it's too late in life for me to take up a new field. As a good friend said who took the course with me, "I prefer Shakespeare."

Sechs Kapitel aus einem Physiklehrbuch sind auch dann noch immer sechs Kapitel aus einem Physiklehrbuch wenn sie vom "Most brilliant teacher" gegeben/geschrieben wurden. Das Gravity Kapitel fand ich tbh echt geil.

Brilliant !!!

I felt as if i visited my college again ! Only with a best teacher this time to teach me the most dreaded Subject - PHYSICS !!!

Most of us who have studied physics in school or college days, would find the physics teachers most sombre, Dull and half-heartedly teaching the subject and on the top of it , they will constantly remind , how this is the only subject people fails the most ! Thanks to you Sirs !!!

Switch to Feynman, the teacher, who leaves no attempt to make the subject so simple , that even a non-technical person can understand it ( i mean most of it ). Best Teacher i have encountered ever for Physics.

The book makes a very good reading . I especially liked the chapter, where he explains how physics penetrates all other branches of science viz, Chemistry, Geology, Biology and even Psychology.

Must Read, if you have that itch to finish what you left back then in college !!!