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Lesson3
ScientificBreakthroughs;Doyouknowhimandhisdiscoveries?;NewtonsLawofUniversalGravitation;Doyouknowthemajordiscoveriesofthescientistsinthepictures?;AlbertEinstein:establishingthe“E=mc2”
equationandthe“theoryofrelativity”
EdwinHubble:discoveringothergalaxies
likeourown
AlexanderFleming:discoveringpenicillin
EckertandMauchly:producingtheworld’sfirstcomputer.;Trytomatchthediscoverieswithhowtheywerediscovered.;penicillin;AlbertEinsteinwasconsideredthegreatestscientistofthe20thcenturyandoneofthegreatestofalltime.HisgreatestdiscoveryisthecreationofhisfamousTheoryofRelativity.;HealsodiscoveredfamousmathematicalstatementE=mc2(energyequalsmasstimesthespeedoflightsquared).Thisstatementorformulaexplainedthatagreatamountofenergycouldcomefromasmallpieceofmatter.;Americanastronomer.Hismostimportantdiscoverywasmadeinthe1920s.Inthelate19thcentury,Hubble’sstudyleadstothemostimportantastronomicaldiscoveryofthetwentiethcentury--theexpandinguniverse.;Andheprovedthatnebulae(星云)weregalaxiesthemselves.Astronomersnowagreethatfardistantgalaxiesdoexist.Tohonorhim,thefirsttelescopewasnamedafterhim.;Hubblespacetelescope;
Todayreflectingtelescopesaretillwidelyusedbyamatuerandprofessionalsastronomersforthesamepurposeastheyhavebeenusedforcenturies-tostudythesky.Althoughtodaytheprinciplesofthereflectingtelescoperemainthesametheapplicationsarefarmoreadvanced
Lightentersthetelescopeandstrikesaconcaveprimarymirror,whichactslikealenstofocusthelight.Thebiggerthemirror,thebettertheimage.
;Scottishbiochemist
February14,1929---FlemingDiscoversPenicillin.
SirAlexanderFlemingwasayoungbacteriologistwhenanaccidentaldiscoveryledtooneofthegreatdevelopmentsofmodernmedicine.;JohnWilliamMauchlywasanAmericanphysicistw
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