Physics In The Classroom Ver 1.4
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1 © 2008 FAU Why is the sky blue? Ibn al-Haytham
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Transcript of Physics In The Classroom Ver 1.4
1 © 2008 FAU
Why is the sky blue?
Ibn al-Haytham
2 © 2008 FAU
Why is the sky blue?
Why?
The most important word in Physics …
3 © 2008 FAU
Why is the sky blue?
Physics Biology Chemistry
4 © 2008 FAU
Why is the sky blue?
You Are Here
You Are Here
You Are Here
5 © 2008 FAU
Why is the sky blue?
You Are Here
You Are Here
You Are Here
6 © 2008 FAU
Why is the sky blue?
Newton.
What makes an apple fall is the same thing that makes the planets circle the sun.
Einstein.
Nothing can ever move faster than the speed of light.
1600’s
1900’s
Physics through History.
Early work in Greece, China, India.
Name a famous female Physicist.
7 © 2008 FAU
Why is the sky blue?
Small.
Atoms, electrons – Quantum Physics.
Big.
Space/Time bend and twist – Relativity.
Today
Two theories.
Both right.
They don’t fit together.
8 © 2008 FAU
Why is the sky blue?
String Theory.
Ten dimensions, maybe eleven, maybe twenty-six.
Strings vibrate; things happen.
Could this be the answer?
(Calabi-Yau Space)
9 © 2008 FAU
Why is the sky blue?
Who uses Physics?
10 © 2008 FAU
Why is the sky blue?
So … Why is the sky blue?
11 © 2008 FAU
Why is the sky blue?
Guesses …
The sky reflects the color of the ocean?
Space is dark – maybe dark blue?
Who cares?
12 © 2008 FAU
Why is the sky blue?
Blue light is scattered more than red.
When the sun is rising/setting, mostly red light reaches us.
At noon, bluer light is scattered to earth, red light not so much.
13 © 2008 FAU
Why is the sky blue?
And here is what that looks like …
Sunrise/Sunset Midday
14 © 2008 FAU
Why is the sky blue?
Thank you.
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