Synthèse de physique - en anglais

Hi, everybody.

And welcome to the first lecture in our

course Exploring Quantum Physics.

Today, I will introduce the main

formulation of quantum theory using

Schrodinger.

And I will also tell you a little bit

about a fascinating history of the

subject.

But before going to this main part, I

would like to talk about the process of

learning quantum physics.

And about why I think, so many people

find it difficult and frustrating.

And I hope that this brief discussion

will help you avoid this frustration, and

make the process of learning quantum

physics here more effective.

Richard Feynman doesn't really need an

introduction.

He was one of the heroes and legends in

physics, universally recognized as a

genius.

He was also a great speaker and

enthusiastic popularizer of physics.

In 1979, he gave a series of very

interesting lectures on quantum physics

at the University of Auckland in New

Zealand.

They're actually available on YouTube

online and I would encourage you to

listen to them.

If you do so, you will see that Feynman

spends 30 or so, minutes in the beginning

of his first lecture to prepare the

audience for what they were going to hear

next.

In one of the main messages of this

introductory part was that no matter what

Feynman was to do, the audience wouldn't

be able to understand Quantum Mechanics

anyway.

That he talks about physics students and

physics professors and their level of

understanding of Quantum Physics.

Let's listen to what Feynman had to say

in this regard.

if I'm going to explain this theory, the

question is, are you going to understand

it?

Will you understand the theory?

When I tell you first that the first time

we really thoroughly explain it to our

own physics students is when they're in

the third year graduate, graduate

physics.

Then, you think the answer is going to be

no.

And that's correct, you will not

understand.

>> [LAUGH] .

>> But this business about not understanding

is a very serious one that we have

between a scientist and an audience.

And I want to be at work with you,

because I want to tell you something.

The students do not understand it either.

>> [LAUGH].

>> And that's because the professor doesn't

understand.

>> [LAUGH].

>> This is not a joke, but very interesting.

>> So, what Feynman seems to be saying is

that nobody, not even professional

physicists, not even himself perhaps,

really understand quantum physics.

Well, this is probably the last thing you

want to hear before starting this course.

But this is strictly not my intention to

give you the impression that you should

give up without even trying.

On the contrary, I'd like to speculate

what I think Feynmam might have meant

there.

But why I think so many people find it

difficult to study quantum physics and

other

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