I just saw this DQ today. Feynman's book is something understood by normal people. QED - Strange theory of light and matter gives an insight to the world like no other book.

For example, did you know that individual light particles (photons) do not travel in a straight line but keep buzzing in all directions and spontaneously disintegrates to electron and positron pairs.

Did you know that unless light strikes matter, we cannot only given a probability distribution about the existence of photons at a given point in space and time? They let individual photons of sodium light pass through a slit and the individual photons hit difference points in the sensor (not necessarily a straight line) and the probability distribution on the sensor is a wave like pattern just like if light were waves and interference did happen.

QED theory explains partial reflection which people from Newton's time failed to answer.

So, now there are four discrete theory in physics: Gravity and Newton mechanics - for large objects traveling slowly Special Gravity and Einstein - for large objects traveling at speed of light Quantum theory - for small particles at normal speeds Quantum Field Theory - for small particles traveling at speed of light

Since QED theory, there are about 60+ standard particles in Physics. And more are being discovered. The latest one is Higgs boson which causes the Higgs field. Higgs field gives mass to particles.

So, theoretically, you can take infinite particles and squeeze them to a point because particles don't occupy volume nor do they have intrinsic mass. Mass exists because of resistance of particles to Higgs field. Photons do not interact with Higgs field and hence has no mass.

All these new insights came from that book.

I suggested reading that book because if you are immersed in the concrete world of coding, there are much more things in the world - especially microscopic particles which behave in a very weird way.

Thanks for the DQ and apologise for not seeing this earlier.