echipa 1_9c clasa a 9-a c
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Microscopul. Echipa 1_9c Clasa a 9-a C. Drumul razelor de lumina. Alcatuirea microscopului. - PowerPoint PPT PresentationTRANSCRIPT
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Echipa 1_9c
Clasa a 9-a C
Microsco
pul
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Alcatuirea microscopului
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Invenţia microscopului electronic a fost posibila in urma unor studii experimentale si teoretice in fizica si inginerie. Din punct de vedere constructiv, microscopul electronic are o structura mult mai complexa decat microscopul optic. Totusi, partile principale ale microscopului electronic indeplinesc aceleasi functii ca si lentilele microscopului optic. Ele sunt magnetice sau electrice
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Microscoapele electronice s-au dovedit a fi unelte puternice de cercetare pentru investigarea structurii principale a materiei in special in curtea medicinei, biologie si stiinta materiei solide. Acestea au ajutat de exemplu pentru a descoperii natura structurii suprafetei a unei varietati de metale si confirmarea formei si comportamentului bacteriilor la fel si a celulelor animale si umane
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PRIMUL MICROSCOP
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MICROSCOP DIN LEMN ( ANUL 1640)
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MICROSCOP PORTABILANUL 1800
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PRIMUL MICROSCOP ALCATUIT DIN MAI MULTE LENTILE
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MICROSCOP DIN LEMN(1650-1750)
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IMAGINI OBTINUTE CU AJUTORUL MICROSCOPULUI
Virusii vazuti la microscop
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FOITA DE CEAPA
PARAMECIUL
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In principal, evolutia microscopului a urmarit:*obtinerea unor marimi liniare in domenii cat mai extinse;*obtinerea unor imagini clare;*Inregistrarea imaginilor observate;observarea comoda a imaginilor;*Un microscop este alcatuit din urmatoarele elemente:-obiectiv;-ocular;-sistem de iluminare;-sistem de inregistrare;
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Cea mai mare marire posibila este de 2 000 X decat cea initiala. Microscoapele electronice moderne pot ajunge la magnificari de aproximativ 1 000 000 X.
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Sfarsit