What hath befallen gravity
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What Hath Befallen Gravity? PowerPoint PPT Presentation


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What Hath Befallen Gravity?. Topic 4. Newton’s rules for the study of natural philosophy. Simplicity Generality Experimental verification Theories are tentative. Three Approaches to Forces. Action at a distance -no mechanism Field Description -space changed by body

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What Hath Befallen Gravity?

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What hath befallen gravity

What Hath Befallen Gravity?

Topic 4


Newton s rules for the study of natural philosophy

Newton’s rules for the study of natural philosophy

  • Simplicity

  • Generality

  • Experimental verification

  • Theories are tentative


Three approaches to forces

Three Approaches to Forces

  • Action at a distance

    -no mechanism

  • Field Description

    -space changed by body

  • Particle Exchange

    -emitted or removed


Flat space vs spherical space

Flat Space vs. Spherical Space


Effect of acceleration

Effect of Acceleration


Principle of equivalence

Principle of Equivalence

  • Downward pull of gravity can be duplicated by an upward acceleration


Curvature of space

Curvature of Space


Deflection of light

Deflection of Light


Orbital precession

Orbital Precession


Gravitational red shift

Gravitational Red Shift


Black hole

Black Hole


Particle exchange

Particle Exchange


Expanding universe

Expanding Universe


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