# ch28 - Chapter 28 Special Relativity 28.1 Events and...

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Chapter 28 Special Relativity

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28.1 Events and Inertial Reference Frames An event is a physical “happening” that occurs at a certain place and time. To record the event, each observer uses a reference frame that consists of a coordinate system and a clock. Each observer is at rest relative to her own reference frame. An inertial reference frame is one in which Newton’s law of inertia is valid.
28.1 Events and Inertial Reference Frames In this example, the event is the space shuttle lift off.

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28.2 The Postulates of Special Relativity THE POSTULATES OF SPECIAL RELATIVITY 1. The Relativity Postulate. The laws of physics are the same in every inertial reference frame. 1. The Speed of Light Postulate. The speed of light in a vacuum, measured in any inertial reference frame, always has the same value of c , no matter how fast the source of light and the observer are moving relative to one another.
28.2 The Postulates of Special Relativity

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28.3 The Relativity of Time: Time Dilation TIME DILATION A light clock
28.3 The Relativity of Time: Time Dilation An observer on the earth sees the light pulse travel a greater distance between ticks.

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28.3 The Relativity of Time: Time Dilation 2 2 1 c v t t o - = Time dilation
28.3

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ch28 - Chapter 28 Special Relativity 28.1 Events and...

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