physics in the classroom ver 1.4
TRANSCRIPT
1 © 2008 FAU
Why is the sky blue?
Ibn al-Haytham
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Why is the sky blue?
Why?
The most important word in Physics …
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Why is the sky blue?
Physics Biology Chemistry
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Why is the sky blue?
You Are Here
You Are Here
You Are Here
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Why is the sky blue?
You Are Here
You Are Here
You Are Here
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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.
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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.
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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)
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Why is the sky blue?
Who uses Physics?
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Why is the sky blue?
So … Why is the sky blue?
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Why is the sky blue?
Guesses …
The sky reflects the color of the ocean?
Space is dark – maybe dark blue?
Who cares?
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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.
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Why is the sky blue?
And here is what that looks like …
Sunrise/Sunset Midday
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Why is the sky blue?
Thank you.