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Living In the ANTI-Material World

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Page 1: Living In the ANTI- Material World. (from Paul Dirac’s Nobel Lecture December 12, 1933) “If we accept the view of complete symmetry between positive and

Living In the

ANTI-Material World

Page 2: Living In the ANTI- Material World. (from Paul Dirac’s Nobel Lecture December 12, 1933) “If we accept the view of complete symmetry between positive and

(from Paul Dirac’s Nobel Lecture December 12, 1933)

“If we accept the view of complete symmetry between positive and negative electric charge so far as concerns the fundamental laws of Nature, we must regard it rather as an accident that the Earth (and presumably the whole solar system) contains a preponderance of negative electrons and positive protons. It is quite possible that for some of the stars it is the other way about, these stars being built up mainly of positrons and negative protons.”

Page 3: Living In the ANTI- Material World. (from Paul Dirac’s Nobel Lecture December 12, 1933) “If we accept the view of complete symmetry between positive and

In a tiny corner of this (or perhaps some other) Universe…

Page 4: Living In the ANTI- Material World. (from Paul Dirac’s Nobel Lecture December 12, 1933) “If we accept the view of complete symmetry between positive and

In a tiny corner of this (or perhaps some other) Universe…

…there is a planet.

Page 5: Living In the ANTI- Material World. (from Paul Dirac’s Nobel Lecture December 12, 1933) “If we accept the view of complete symmetry between positive and

In a tiny corner of this (or perhaps some other) Universe…

…there is a planet.

A strange world.

Page 6: Living In the ANTI- Material World. (from Paul Dirac’s Nobel Lecture December 12, 1933) “If we accept the view of complete symmetry between positive and

In a tiny corner of this (or perhaps some other) Universe…

…there is a planet.

A strange world.

AN ANTIMATTER PLANET

Page 7: Living In the ANTI- Material World. (from Paul Dirac’s Nobel Lecture December 12, 1933) “If we accept the view of complete symmetry between positive and

THE PLANETADANACIA

Page 8: Living In the ANTI- Material World. (from Paul Dirac’s Nobel Lecture December 12, 1933) “If we accept the view of complete symmetry between positive and

Adanacia is very much like

our Earth

except that

Page 9: Living In the ANTI- Material World. (from Paul Dirac’s Nobel Lecture December 12, 1933) “If we accept the view of complete symmetry between positive and

Adanacia is very much like

our Earth

except that

everything, all matter,

is composed of antimatter.

Page 10: Living In the ANTI- Material World. (from Paul Dirac’s Nobel Lecture December 12, 1933) “If we accept the view of complete symmetry between positive and

The Adanacians do not refer to

the matter on their world

as “antimatter”.

Page 11: Living In the ANTI- Material World. (from Paul Dirac’s Nobel Lecture December 12, 1933) “If we accept the view of complete symmetry between positive and

The Adanacians do not refer to

the matter on their world

as “antimatter”.

Why should they?

Page 12: Living In the ANTI- Material World. (from Paul Dirac’s Nobel Lecture December 12, 1933) “If we accept the view of complete symmetry between positive and

The Adanacians do not refer to

the matter on their world

as “antimatter”.

Why should they?

They call it matter.

Page 13: Living In the ANTI- Material World. (from Paul Dirac’s Nobel Lecture December 12, 1933) “If we accept the view of complete symmetry between positive and

It is YOU who are made of

antimatter as far as we are

concerned.

It is YOU who are made of

antimatter as far as we are

concerned.

Page 14: Living In the ANTI- Material World. (from Paul Dirac’s Nobel Lecture December 12, 1933) “If we accept the view of complete symmetry between positive and

Let us assume that we can both

communicate with the planet’s inhabitants,

and even observe them and their surroundings.

Page 15: Living In the ANTI- Material World. (from Paul Dirac’s Nobel Lecture December 12, 1933) “If we accept the view of complete symmetry between positive and

BUT, that we cannot

interact with them or their surroundings

PHYSICALLY.

Page 16: Living In the ANTI- Material World. (from Paul Dirac’s Nobel Lecture December 12, 1933) “If we accept the view of complete symmetry between positive and

How could we know for certain that this

planet (and everything on it)

was composed of antimatter?

Page 17: Living In the ANTI- Material World. (from Paul Dirac’s Nobel Lecture December 12, 1933) “If we accept the view of complete symmetry between positive and

Is there anything we could ask theAdanacians?

Page 18: Living In the ANTI- Material World. (from Paul Dirac’s Nobel Lecture December 12, 1933) “If we accept the view of complete symmetry between positive and

Is there anything they could do in order to demonstrate for us that their planet is

composed of what we call antimatter?

(the Adanacians have a knowledge of science and

a technology that is at least equivalent to our

own).

Page 19: Living In the ANTI- Material World. (from Paul Dirac’s Nobel Lecture December 12, 1933) “If we accept the view of complete symmetry between positive and

Discuss!Discuss!

Page 20: Living In the ANTI- Material World. (from Paul Dirac’s Nobel Lecture December 12, 1933) “If we accept the view of complete symmetry between positive and
Page 21: Living In the ANTI- Material World. (from Paul Dirac’s Nobel Lecture December 12, 1933) “If we accept the view of complete symmetry between positive and

Oh, and by the way…

Oh, and by the way…

Page 22: Living In the ANTI- Material World. (from Paul Dirac’s Nobel Lecture December 12, 1933) “If we accept the view of complete symmetry between positive and

…there IS a way to for you to determine

whether we live in a world made of

what you call antimatter…

…there IS a way to for you to determine

whether we live in a world made of

what you call antimatter…

Page 23: Living In the ANTI- Material World. (from Paul Dirac’s Nobel Lecture December 12, 1933) “If we accept the view of complete symmetry between positive and

If you are interested, see the Extension

Topic “Through The Looking

Glass”.

If you are interested, see the Extension

Topic “Through The Looking

Glass”.


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