1 sci190 the physical universe john e. erdei department of physics
TRANSCRIPT
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SCI190
The Physical Universe
John E. Erdei
Department of Physics
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Untethered EVA
Approximately 200 mi above the surface of the
earth
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There is only ONE event being shown on the overhead
Why were there multiple answers???
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Untethered EVA
Approximately 200 mi above the surface of the
earth
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Untethered EVA
Approximately 200 mi above the surface of the
earth
Is the person is the spacesuit a good person or a bad
person?
10Why is this guy connected to all this stuff?
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Ionia
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DEVELOPMENT OF MODERN SCIENCE
GREEK
PHILOSOPHERS (600 - 400 BC)
INTERNAL EXTERNAL NATURAL
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Philosopher: Lover of Wisdom
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DEVELOPMENT OF MODERN SCIENCE
GREEK
PHILOSOPHERS
INTERNAL EXTERNAL NATURAL
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Philosopher: Lover of Wisdom
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DEVELOPMENT OF MODERN SCIENCE
GREEK
PHILOSOPHERS
INTERNAL EXTERNAL NATURAL
Physics
Chemistry
GeologyBiology
Astronomy
Medicine
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DEVELOPMENT OF MODERN SCIENCE
GREEK
PHILOSOPHERS
INTERNAL EXTERNAL NATURAL
Physics
Chemistry
GeologyBiology
Astronomy
Medicine
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Thales: Nature can be explained without the intervention of the gods.
Physics – Greek Philosophy
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Thales: Nature can be explained without the intervention of the gods.
Anaxagoras: Experimentation required to understand nature.
Physics – Greek Philosophy
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Thales: Nature can be explained without the intervention of the gods.
Anaxagoras: Experimentation required to understand nature.
Aristotle: Method of detailed reasoning.
Physics – Greek Philosophy
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Thales: Nature can be explained without the intervention of the gods.
Anaxagoras: Experimentation required to understand nature.
Aristotle: Method of detailed reasoning.
Democritus: Physical Laws
Physics – Greek Philosophy
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Thales: Nature can be explained without the intervention of the gods.
Anaxagoras: Experimentation required to understand nature.
Aristotle: Method of detailed reasoning.
Democritus: Physical Laws
Pathagoras: Mathematics is appropriate.
Physics – Greek Philosophy
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DEVELOPMENT OF MODERN SCIENCE
GREEK
PHILOSOPHERS (600 - 400 BC)
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Philosopher: Derived from the Greeekword meaning lover of wisdom.
SCIENCE vs TECHNOLOGY
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DEVELOPMENT OF MODERN SCIENCE
Ptolemy (140 AD): Proposed model of the universebased on celestial spheres with the earth at the center.
Bacon (1214 - 1292): Nature can be understood bydivine knowledge and experimentation.
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Galileo (1564-1642)
Physics – Science Revived
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Galileo (1564-1642)
* Nature operates with precision.
Physics – Science Revived
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Galileo (1564-1642)
* Nature operates with precision.
* Laws of Nature must be stated unambiguously and must reflect the precision of Nature.
Physics – Science Revived
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Galileo (1564-1642)
* Nature operates with precision.
* Laws of Nature must be stated unambiguously and must reflect the precision of Nature.
* Language used must be precise.
Physics – Science Revived
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Galileo (1564-1642)
* Nature operates with precision.
* Laws of Nature must be stated unambiguously and must reflect the precision of Nature.
* Language used must be precise.
Scientists (Physicists) must be bi-lingual
Physics – Science Revived
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Galileo (1564-1642)
* Nature operates with precision.
* Laws of Nature must be stated unambiguously and must reflect the precision of Nature.
* Language used must be precise.
Scientists (Physicists) must be bi-lingual
* Words (ambiguous)
Physics – Science Revived
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Galileo (1564-1642)
* Nature operates with precision.
* Laws of Nature must be stated unambiguously and must reflect the precision of Nature.
* Language used must be precise.
Scientists (Physicists) must be bi-lingual
* Words (ambiguous)
* Mathematics (Precise)
Physics – Science Revived
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DEVELOPMENT OF MODERN SCIENCE
Galileo (1564 - 1642):
* Formulation of the Scientific Method
Make observations of natureMake a hypothesisTest the hypothesis by making a predicitonRepeat the process
* After enough testing, hypothesis becomes an acceptedlaw
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Nature Operates in accordance with Mechanical Laws - Thales, Democritus, Galileo, Newton
Physics – Science Revived
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Nature Operates in accordance with Mechanical Laws - Thales, Democritus, Galileo, Newton
Physics – Science Revived
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Nature Operates in accordance with Mechanical Laws - Thales, Democritus, Galileo, Newton
Physics – Science Revived
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Nature Operates in accordance with Mechanical Laws - Thales, Democritus, Galileo, Newton
Physics – Science Revived
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Experimentation is Required - Anaxagoras, Bacon
Physics – Science Revived
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Experimentation is Required - Anaxagoras, Bacon
Physics – Science Revived
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A particular process of reasoning must be used in order to effectively uncover the properties of nature - Aristotle, Galileo
Physics – Science Revived
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A particular process of reasoning must be used in order to effectively uncover the properties of nature - Aristotle, Galileo
Physics – Science Revived
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Mathematics the an appropriate language - Pythagoras, Galileo
Physics – Science Revived
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Mathematics the an appropriate language - Pythagoras, Galileo
Physics – Science Revived
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Mathematics the an appropriate language - Pythagoras, Galileo
Physics – Science Revived
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Mathematics the an appropriate language - Pythagoras, Galileo
Physics – Science Revived
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Mathematics the an appropriate language - Pythagoras, Galileo
Physics – Science Revived
We need to be able to “talk” to nature, and the language of nature appears to be mathematics
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Implications
Physics – The Present
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Implications
* Nature can be understood (Maxwell’s Demon)
Physics – The Present
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Implications
* Nature can be understood (Maxwell’s Demon)
* Laws of Nature do not change
Physics – The Present
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Implications
* Nature can be understood (Maxwell’s Demon)
* Laws of Nature do not change
* Nature is predictable (Newton’s well ordered universe)
Physics – The Present
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What is Physics?
Physics – The Present
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What is Physics?
Physics is the “Legislative Branch” of the Sciences
Physics – The Present
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What are you here to Learn?
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What are you here to Learn?
Understand the past
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What are you here to Learn?
Understand the past
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What are you here to Learn?
Understand the past
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What are you here to Learn?
Understand the past
Doppler shift – Color (light) determined by wavelength (in meters).
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What are you here to Learn?
Understand the past
Doppler shift – Color (light) determined by wavelength (in meters).
If the source of the light is moving, the wavelength (or color) will “shift” by an amount determined by the speed of the source.
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What are you here to Learn?
Understand the past
Doppler shift – Color (light) determined by wavelength (in meters).
If the source of the light is moving, the wavelength (or color) will “shift” by an amount determined by the speed of the source.
Can provide information about astronomical systems far away from the earth.
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What are you here to Learn?
Understand the past
Understand the Present
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What are you here to Learn?
Understand the past
Understand the Present
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What are you here to Learn?
Understand the past
Predict the
Future
Understand the Present
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What are you here to Learn?
Understand the past
Predict the
Future
Understand the Present
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What are you NOT here to Learn?
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Untethered EVA
Approximately 200 mi above the surface of the
earth
Is the person is the spacesuit a good person or a bad
person?
What are you NOT here to Learn?