The Character of Physical Law - Richard Feynman:

“... it is impossible to explain honestly the beauties of the laws of nature in a way that people can feel, without their having some deep understanding of mathematics. I am sorry, but this seems to be the case.”  ~ Richard Feynman. 

Richard P. Feynman: One of the most eminent & imaginative modern physicists, he was Professor of Theoretical Physics at the California Institute of Technology until his death in 1988. He's best known for work on the quantum theory of the electromagnetic field, as well as for later research in the field of low-temperature physics.

In 1954 he received the Albert Einstein Award for an "outstanding contribution to knowledge in mathematical & physical sciences". 

In 1965 he was appointed to Foreign Membership in the Royal Society & was awarded the Nobel Prize for an "for their fundamental work in quantum electrodynamics, with deep-ploughing consequences for the physics of elementary particles".

The seven chapters of Characters of Physical Law has value as a demonstration of a mind in action, which make up this blog (post) were lectures presented as the Messenger Lectures at Cornell University in the United States, by Richard P. Feynman.

1).  The Law of Gravitation, an example of Physical Law:

2).  The Relation of Mathematics to Physics:

3).  The Great Conservation Principles:

4).  Symmetry in Physical Law:

5).  The Distinction of Past and Future:

6).  Probability and Uncertainty - the Quantum Mechanical view of Nature:

7).  Seeking New Laws:

Click here for AUDIO Book & PDF Book of The Character of Physical Law, by Richard P. Feynman..

18 Equations that changed the WORLD:

"If you want to learn about nature, to appreciate nature, it is necessary to understand the language that she speaks in."

~ Richard P. Feynman

Mathematics is a language of Nature, which describes the ways of nature. Mathematics is also called a tools for reasoning. It is a language plus reasoning, it is like a language plus logic.

In 2013, mathematician and science author Ian Stewart published a book on 17 Equations That Changed The World.

If you would like to download a poster, Click here.

A Map of Everything know about Mathematics | Mathematics

The laws of Nature are written in the language of mathematics....

If you want to learn about nature, to appreciate nature, it is necessary to understand the language that she speaks in.  ~ Richard P. Feynman

Source: Dominic Walliman (Youtube)

Mathematics is one of the most fascinating languages humanity has ever devised, but without university - level expertise, we're going to have a very bad time trying to figure out how things like chaos theory and fractal geometry tie in with machine learning and all those crazy prime numbers we keep finding. [1]

The entire field of mathematics summarized in a single map. This shows how pure mathematics and applied mathematics relate to each other and all of the sub - topics they are made from. Let's enjoy with a video, what's the map of mathematics is?

Click here: for the map of PHYSICS

>> How Feynman Diagrams Almost Saved Space

Feynman, normally as quick and lively as they come, went silent. It was the only time I’ve ever seen him look wistful. Finally he said dreamily, “I once thought I had that one figured out. It was beautiful.” And then, excited, he began an explanation that crescendoed in a near shout: “The reason space doesn’t weigh anything, I thought, is because there’s nothing there!”

Picture Source: Feynman Diagram

Click here for more detail: How Feynman Diagrams Almost Saved Space By:  Frank Wilczek

>> Richard Feynman - The Rule of the Game . . . . . . :

Richard Feynman

"We can imagine that this complicated array of moving things which constitute 'the world' is something like a great chess game being played by the gods, and we are observers of the game. We do not know what the rules of the game are; all we are allowed to do is to watch the playing. Of course, if we watch long enough, we may eventually catch on to a few of the rules. The rules of the game are what we mean by fundamental physics. Even if we know every rule, however..... what we really can explain in terms of those rules is very limited, because almost all situations are so enormously complicated that we cannot follow the plays of he game using the rules, much less tell what is going to happen next.

We must, therefore, limit ourselves to the more basic question of the rules of the game. If we know the rules, we consider that we 'understand' the world."

                                                                                                               - Richard Feynman

Love Letter - Richard Feynman & his Wife:

Richard Feynman & Arline

Richard Feynman: He was remarkable person. He was one of the greatest Physicist of the 20^th century. I am extremely inspire & fascinated by his skill, personality & his ability. 

In June 1945, Physicist Richard Feynman lost his soul mate: wife Arline Feynman to tuberculosis. 16 month later, in October 1946, he wrote following love letter to his wife. But that letter was sealed & never opened until his own death in 1988. 

I have been obsessed with this letter. It's been a lovely...., slow...., quiet.... & deeply heart touching........ :

October 17, 1946

D'Arline,

I adore you, Sweetheart.

I know how much you like to hear that - but I don't only write it because you like it - I write it because it makes me warm all over inside to write it to you.

It is such a terribly long time since I last wrote to you - almost two years but I know you'll excuse me because you understand how I am, stubborn and realistic; and I thought there was no sense to writing.

But now I know my darling wife that it is right to do what I have delayed in doing, and that I have done so much in the past. I want to tell you I love you. I want to love you. I always will love you.

I find it hard to understand in my mind what it means to love you after you are dead - but i still want to comfort and take care of you - and I want you to love me and care for me. I want to have problems to discuss with you - I want to do little projects with you. I never thought until just now that we can do that. What should we do. We started to learn to make clothes together - or learn Chinese - or getting a movie projector. Can't I do something now? No. I am alone without you and you were the "idea-woman"and general instigator of all our wild adventures.

When you were sick you worried because you could not give me something that you wanted to and thought I needed. You needn't have worried. Just as I told you then there was no real need because I loved you in so many ways so much. And now it is clearly even more true - you can give me nothing now yet I love you so that you stand in my way of loving anyone else - but I want you to stand there. You, dead, are so much better than anyone else alive.

I know you will assure me that I am foolish and that you want me to have full happiness and don't want to be in my way. I'll bet you are surprised that  don't even have a girlfriend (except you, sweetheart) after two years. But you can't help it, darling, nor can I - I don't understand it, for I have met many girls and very nice ones and I don't want to remain alone - but in two or three meetings they all seem ashes. You only are left to me. You are real.

My darling wife, I do adore you.

I love my wife. My wife is dead.

Rich.

PS Please excuse my not mailing this - but I don't know your new address.

For more detail about Richard Feynman - Click & Go on

: Surely you're joking, Mr. Feynman.

: The Physicist captured in 3-films.

: Love letter: Richard Feynman.

: A short talk about Richard Feynman.

Richard Feynman: No Ordinary Genius (Science Physics Documentary)

"I don't know anything , but I do know that everything is interesting if you go into it deeply enough." - Richard Feynman

No need to introduce more about 'Richard Feynman' especially in the world of PHYSICS. Richard Feynman was no ordinary genius. Brilliant, free-spirited & irreverent. He has amazing personality & sense of humor. I am extremely inspire & fascinated by his skill, personality & his ability. I have no anymore word to introduce about him.

I only request you to watch this documentary & analyzing yourself, Who is he? And What types of person he is?

This is the DOCUMENTARY taken from  BBC Horizon Documentary, named - "Richard Feynman - No Ordinary Genius":

For more to read on Feynman's Life, I suggest you to go HERE

A2. How to Visualize atom?

"If an apple was magnified to the size of the Earth, then the atoms in the apple would be approximately the size of the original apple." - Richard Feynman.

 From the ancient Greek philosopher Democritus (around 460 B. S. ago) through now's a day, we have to ponder that what ordinary matter is made of? What is the basic unit of matter? What is it made of? What everything around us is made of? What we eat? What we see? What we touch? Etc.

We know all, that is ATOM.

Atoms are so small that is very difficult for the human mind to comprehend their size. The diameter of an atom range from about 0.1 to 0.5 nanometer (1 × 10^-10 m to 5 × 10^-10 m). Everything (matter) in the visible universe is made up of atoms, the amount of atoms is that matter is incredible.

Magnifying the ATOM

But how can we visualize that very small atom? What does it look like? To understand this problem, here are some simple demonstration:

• From a book entitled "The Extraordinary chemistry of ordinary things, 3rd Edition" by Carl H. Snyder.

1. Take a pile of paper clips (all of same size & color).
2. Divide the pile into two equal piles. 
3. Divide each of the smaller piles into two equal piles.
4. Repeat step 3 until you are down to a pile containing only one paper clip. That one paper clip still does the job of a paper clip (i.e. hold loose papers together).
5. Now, take a pair of scissors & cut that one paper clip in half. Can half of the paper clip do the same job as the single paper clip?

If you do the same things with any element, you will reach an indivisible part has the same properties of the element, like the single paper clip. This indivisible part is called an 'ATOM'. 

•  Make the structure of an atom easier to visualize by showing how small the nucleus is to the total size of an atom. According to Canada's National Laboratory for particle Physics, if the golf ball represents the nucleus, the first group of electron would be a kilometer away. The second group would be 4 - kilometer away, the third 9 - kilometer away & so on.

 Use another examples to help illustrate the concept of visualize atom:

• If an apple were enlarged to the size of the earth , its individual atoms would be the size of original apple. 

Note: Mean Radius of earth = 6,371 kilometer (≈3,959 mi).

 

Scanning Tunneling microscope

Visualize an atom - compare between Earth & Apple

• Imagine that the nucleus of an atom was the size of our sun. In that case the closest electron would be beyond Mars.

• A single drop of water contains about 2,000,000,000,000,000,000,000 (2*10^21 atoms) atoms of oxygen, and twice that many hydrogen atoms.

• A typical human hair is about 1 million carbon - 12 atoms JUST IN WIDTH.

• There are about 5 millions atoms in the full stop at the end of this sentence.

• Protons are much larger than electrons. One proton is equivalent to 2000 electrons. The difference between them is equivalent to that between a human being & a peanut.