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Ãëàâíàÿ >> Òåñòû ïî ôèçèêå 9 êëàññ. Ãðîìöåâà. Ê ó÷åáíèêó À.Â. Ïåðûøêèíà «Ôèçèêà. 9 êëàññ» |
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Ãëàâà III. Ýëåêòðîìàãíèòíîå ïîëå Ïðåëîìëåíèå ñâåòà. Ôèçè÷åñêèé ñìûñë ïîêàçàòåëÿ ïðåëîìëåíèÿ1. Ïîêàçàòåëü ïðåëîìëåíèÿ ñòåêëà áîëüøå ïîêàçàòåëÿ ïðåëîìëåíèÿ âîäû. Ïðè ïåðåõîäå èç âîäû â ñòåêëî óãîë ïðåëîìëåíèÿ 1) áîëüøå óãëà ïàäåíèÿ
2. Ëó÷ ñâåòà ïðåëîìëÿåòñÿ íà ãðàíèöå ñòåêëî-âîçäóõ. Óãîë ïàäåíèÿ ïðè ýòîì 1) áîëüøå óãëà ïðåëîìëåíèÿ
3. Óãîë ïàäåíèÿ ëó÷åé íà ñòåêëÿííóþ ïëàñòèíêó 60°, à óãîë ïðåëîìëåíèÿ â 2 ðàçà ìåíüøå. Îïðåäåëèòå ïî ýòèì äàííûì ïîêàçàòåëü ïðåëîìëåíèÿ ñòåêëà.
4. Åñëè ëó÷ ïàäàåò íà ãðàíèöó ðàçäåëà äâóõ ïðîçðà÷íûõ ñðåä ïîä óãëîì 45°, òî óãîë ïðåëîìëåíèÿ ñîñòàâëÿåò 60°. Îïðåäåëèòå ïî ýòèì äàííûì îòíîñèòåëüíûé ïîêàçàòåëü ïðåëîìëåíèÿ.
5. Ëó÷ èç âîçäóõà ïåðåõîäèò â àëìàç. Ïðè êàêîì óñëîâèè óãîë ïàäåíèÿ ðàâåí óãëó ïðåëîìëåíèÿ? 1) Ëó÷ ïàäàåò ïàðàëëåëüíî ãðàíèöå ðàçäåëà äâóõ Ñðåä
6. ×åìó ðàâåí àáñîëþòíûé ïîêàçàòåëü ïðåëîìëåíèÿ âàêóóìà?
7. Â êàêîé ñðåäå ñâåò ðàñïðîñòðàíÿåòñÿ ñ ìàêñèìàëüíîé ñêîðîñòüþ? 1) Â âîäå
8. Àáñîëþòíûé ïîêàçàòåëü ïðåëîìëåíèÿ âîäû 1,33. Ñ êàêîé ñêîðîñòüþ ðàñïðîñòðàíÿåòñÿ ñâåò â ýòîé æèäêîñòè? Ñêîðîñòü ñâåòà â âàêóóìå ñ = 3 • 108 ì/ñ.
9. Ïîêàçàòåëè ïðåëîìëåíèÿ îòíîñèòåëüíî âîçäóõà äëÿ âîäû, ñòåêëà è àëìàçà ñîîòâåòñòâåííî ðàâíû 1,33; 1,5; 2,42. Â êàêîì âåùåñòâå ñâåò ðàñïðîñòðàíÿåòñÿ ñ ìèíèìàëüíîé ñêîðîñòüþ? 1) Â âîäå
10. Ïîêàçàòåëè ïðåëîìëåíèÿ îòíîñèòåëüíî âîçäóõà äëÿ âîäû, ñòåêëà è àëìàçà ñîîòâåòñòâåííî ðàâíû 1,33; 1,5; 2,42. Â êàêîì âåùåñòâå ñâåò èìååò ìàêñèìàëüíóþ äëèíó âîëíû? 1) Â âîäå
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