Lec+24 - Lecture 24 Rela&vity(A Special Theory of Rela0vity...

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Lecture’24 Rela&vity (A) Special Theory of Rela0vity ±
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What’is’Rela1vity?’ Rela&vity ’is’the’feld’oF’study’ that’measures’ events ,’where’ and’when’they’happen,’and’by’ how’much’any’two’events’are’ separated’in’ space ’and’in’ &me .’ In’addi1on,’rela1vity’has’to’do’ with’ transforming such’ measurements’(also’ measurements’oF’energy’and’ momentum)’between’ reference frames that’move’ rela&ve ’to’each’other.’ 2’ hDp://images.wikia.com/clubpenguin/images/F/F4/ Space_1me_con1nuum.jpg hDp://upload.wikimedia.org/wikipedia/commons/thumb/6/6a/ Iner1al_Frames.PNG/434px-Iner1al_Frames.PNG
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Special’vs.’General’ Special Theory’of’ Rela1vity’deals’with’ iner&al ’reference’frames’ (in’which’ Newton’s frst law ’is’valid).’ General Theory’of’ Rela1vity’deals’with’the’ more’challenging’situa1on’ in’which’reference’frames’ can’undergo’ gravita&onal accelera&on .’ 3’ hDp://www.brainpickings.org/wp-content/uploads/20±2/08/ cigareDecards_speed.jpeg hDp://uanews.org/sites/default/Fles/styles/story-page-headline-800-300/public/story- images/NASA%20Gravity%20Probe%20.jpg?itok=7xTtW-r5
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Star Trek (TNG) – Descent (Part 1) [1993] 4’ hDp://www.youtube.com/watch?v=TrR0ipCQysI HAWKING:’But’then’I’said,’in’that’ frame of reference ,’ the’perihelion’of’Mercury’would’have’ precessed’in’the’ opposite’direc1on.’ EINSTEIN:’(laughing)’That’is’a’great’story!’ ±ATA:’Quite’amusing,’±octor’Hawking.’You’see,’Sir’ Isaac,’the’joke’depends’on’an’understanding’of’the’ rela&vis&c curvature of space-&me .’If’two’ non-iner&al reference’frames’are’in’ rela&ve mo&on . NEWTON:’±o’not’ patronise’me,’sir.’I’invented’physics.’ The’day’that’apple’fell’on’my’head’was’the’most’ momentous’day’in’the’history’of’science.’ HAWKING:’Not’the’apple’story’again.’ ±ATA:’That’story’is’generally’considered’to’be’ apocryphal.’ NEWTON:’What?’How’dare’you!’ EINSTEIN:’Perhaps’we’should’return’to’the’game.’Let's’ see,’where’were’we?’Yes,’you’raised’Mister’±ata’four,’ which’means’that’the’bet’is,’ er,’seven’to’me?’ NEWTON:’The’bet’is’ten!’Can't’you’do’simple’ arithme1c?’I’don't’even’know’why’I'm’here’in’the’Frst’ place.’What’is’the’point’of’playing’this’ridiculous’ game?’ ±ATA:’When’I’play’poker’with’my’shipmates,’it’o²en’ appears’to’be’a’useful’forum’for’exploring’the’ di³erent’facets’of’humanity.’I’was’curious’to’see’how’ three’of’history's’greatest’minds’would’interact’in’this’ se´ng.’So’far,’it’has’proved’most’illumina1ng.’
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Lec+24 - Lecture 24 Rela&vity(A Special Theory of Rela0vity...

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