final_exam_study_guide

final_exam_study_guide - ASTR115 Study Guide Ancient...

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ASTR115’Study’Guide Ancient’cosmology:’Why’did’the’Greeks’believe’the’world’was’round?’(Name’three’ reasons.)’ What’are’epicycles,’and’why’did’Ptolemy’need’them? How’did’Copernicus±’theory’explain’retrograde’motion?’How’did’Copernicus’explain’ the’lack’of’ob served’stellar’parallax? ’ What’did’Galileo’discover’through’his’telescope’that’challenged’the’prevailing’ viewpoint’of’the’heavens? Kepler±s’laws:’what’are’they?’Why’was’Kepler±s’theory’more’natural’than’ Copernicus±?’(No’need’for’epicycles’or’equants.) What’ were’Isaac’Newton±s’accomplishments? ’How’did’his’theories’change’our’view’ of’the’natural’world?’(By’making’quantifiable’predictions,’physics’changed’from’ philosophy’into’a’science.) Light’&’Telescopes ’ What’are’the’wavelike’behaviors’of’light?’(Three’of’th em.)’ What’phenomenon’did’Einstein’use’to’show’that’light’can’behave’like’a’particle?’ (Photoelectric’effect.) ’ A’light’beam’is’made’up’of’photons’with’a’certain’energy.’What’happens’to’the’ photons’if’the’frequency’of’the’light’is’increased?’What’happens’if’t he’ brightness ’of’ the’light’source’is’increased,’while’the’frequency’stays’fixed?’(A’related’question:’ why’is’it’that’even’a’weak’source’of’X -rays’or’gamma’rays’can’be’harmful,’while’a’ radio’wave’is’harmless’no’matter’how’strong’the’signal’is?)
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final_exam_study_guide - ASTR115 Study Guide Ancient...

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