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Space, Time and Einstein
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Slide 1

Fermilab

Fermilab

Chicago (~40 miles)

Slide 2

Why space and time?

Why space and time?

Related to our work at Fermilab

Hopefully related to things youre learning in school

Physics and astronomy, but also chemistry

Some really interesting questions about the world

Where do things happen? In space

When do things happen? In time

Slide 3

Why Einstein?

Why Einstein?

Because he was Einstein!

Easily the greatest physicist and scientist in modern history. One of the great men of the 20th century

1905: Clerk in Patent Office

At older age!

School boy

Slide 4

What did Einstein do?

What did Einstein do?

Many, many discoveries. Easily could have won 3-4 Nobel prizes

He was a really smart man!

I will talk today about his two theories of relativity (Special Relativity and General Relativity)

E=mc2 (special relativity)

Black holes (general relativity)

Slide 5

Space and time (a students perspective?)

Space and time (a students perspective?)

Space

This piece of paper is 8 inches long

It is 1.5 miles from the school to the store

Time

I have to get up at 7 am

The bus is 20 minutes late

But

What do we mean by distance (such as 1.5 miles)?

What do we mean by a time (such as 7 am)?

Slide 6

Space and time for Aristotle

Space and time for Aristotle

The prime mover

An unknown, priviledged being in THE state of perpetual, absolute rest

Space

Defined by (x, y, z) coordinate system with respect to the prime mover

Unique and clearly defined

Time

Time is measured by the prime movers clocks

Aristotle (384-322 BC)

Slide 7

Space for Galileo

Space for Galileo

No such things as absolute rest

The laws of nature and physics are identical for anybody moving with a constant speed along a straight line

Galileo Galilei (1564-1642)

Slide 8

Space for Sir Isaac Newton

Space for Sir Isaac Newton

Absolute Space, in its own nature, without regard to any thing external, remains always similar and immovable. Relative Space is some moveable dimension or measure of the absolute spaces; which our senses determine, by its position to bodies; and which is vulgarly taken for immovable space . And so instead of absolute places and motions, we use relative ones

There exists absolute space, but we measure space only relative to other objects in space

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