# Shared Flashcard Set

## Details

Moore 1
The Principle of Relativity
21
Physics
10/04/2009

Term
 Is there any way, when you are confined within an inertial reference frame, to know whether it is you who are moving or the Other that is moving?
Definition
 no.
Term
 informal statement of the principle of relativity
Definition
 The laws of physics are the same inside a laboratory moving at a constant speed as they are in a laboratory at rest.
Term
 Who was the first to state the principle of relativity?
Definition
 Galileo
Term
 On what basic principle is Einstein's theory or relativity founded?
Definition
 The principle of relativity
Term
 How did Einstein revolutionize Galileo's relativity theory?
Definition
 He said that it applies to ALL the laws of physics, especially the laws of electromagnetism.
Term
 What is the priciple of relativity?
Definition
 It is a postulate; it cannot be proved beyond a doubt. It has not been disproved yet, however.
Term
 definition: event
Definition
 An event is any physical occurrence that we can consider to happen at a definite place in space and at a definite instant in time.
Term
 definition: spacetime coordinates
Definition
 we can quantify an event with 4 numbers- i.e. spacetime coordinates=3 numbers that specify the location of the event in some 3 dimensional spatial coordinate system and 1 number that specifies what thime the event occured.
Term
 How do we quantify motion of an object?
Definition
 by treating it as a series of events
Term
 operational definition of spacetime coordinates
Definition
 one attaches a clock to each intersection of time and space within the 3 dimensional spacial coordinate system to get a space time coordinate system
Term
 Why is it important to have a clock at every lattice intersection?
Definition
 if we attempt to read the time of an event by using a clock located a substantial distance away, we need to make assumptions about how long it took the information that the event has occurred to reach that distant clock.
Term
 definition: reference frame
Definition
 is a rigid cubical lattice of appropriately synchronized clocks or its functional equivalent.
Term
 definition: observer
Definition
 a (possibly hypothetical) person who interprets measurements made in a reference frame
Term
 inertial vs. noninertial frames
Definition
 An inertial frame is one in which an isolated object is always and everywhere observed to move at a constant velocity(as required by Newton's first law). in a noninertial frame, such an object is observed to move with a nonconstant velocity in at least some situations.
Term
 first law detector
Definition
 Electrical "fingers" hold a ball in place within a spherical detector. When the ball is released, it should remain at rest by Newton's first law; if it does not, the frame to which the detector container is attached is noninertial.
Term
 some consequences that follow from the definition of inertial frames
Definition
 Any inertial reference frame will be observed to move at a constant velocity relative to any other inertial reference frame. Conversely, a rigid, nonrotating reference frame that moves at a constant velocity with respect to any other inertial reference frame must itself be inertial.
Term
 formal statement of the principle of relativity
Definition
 The laws of physics are the same in all inertial reference frames
Term
 newtonian approach to clock synchronization
Definition
 time is absolute and flows equable without regard to anything external. Therefore, we can use 1 master clock to synchronize the other clocks. consequence=galilean transformation equations
Term
 Galilean transformation equations
Definition
 position: x'= x - ßtvelocity: v'= v - ßacceleration: a'= a
Term