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?

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

  • Particle Exchange

    -emitted or removed


Flat Space vs. Spherical Space


Effect of Acceleration


Principle of Equivalence

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


Curvature of Space


Deflection of Light


Orbital Precession


Gravitational Red Shift


Black Hole


Particle Exchange


Expanding Universe


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