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N*>$wDLF (a1%2!D%iV!?&D%iV! CVCTλ€vµ/; N>/)'4*_*!D)a>$V!KP !D%iV!P 9~ 4v; 9c /; @ [...]... khỏc nhau thi khỏc nhau vờ sụ lng, mau sc, v trớ cua cỏc vach va ụ sỏng tng ụi gia cỏc vach Cõu 39: Chon phỏt biờu sai: A Hin tng tỏn sc ỏnh sỏng la hin tng khi mụt chựm ỏnh sỏng trng truyờn qua mụt lng kớnh b phõn tớch thanh mụt dai mau biờn thi n liờn tc t ờn tớm B nh sỏng trng la tp hp cua vụ sụ ỏnh sỏng n sc khỏc nhau, co mau biờn thi n liờn tc t ờn tớm C nh sỏng co bc song cang dai thi chiờt... Trong phan ng hat nhõn 19 F + p 16 O + X thi X la: 9 8 + A ntron B electron C hat D hat 56 Cõu 20(TN THPT 2009): Hat nhõn bờn vng nht trong cỏc hat nhõn 24 H e , 235U , 26 Fe 92 va 137 C s la 55 56 A 24 H e B 235U C 26 Fe D 137C s 92 55 thi iờm Cõu 21:(ờ thi TN nm 2011) Mụt cht phong xa co hng sụ phong xa ban õu co N0 hat nhõn Sụ hat nhõn a b phõn ra sau thi gian t la: A N 0 (1 t) B N 0 (1 ... x2 ( khụng tớnh M,N ) * gia s x1 < x2 + Võn sỏng : x1 < ki < x2 + Võn tụi x1 < (k + 0,5)i < x2 Khi o k Z la sụ võn cõn tim Lu ý: - M, N cựng phớa võn trung tõm thi x1 va x2 cựng du khỏc phớa võn trung tõm thi khỏc du - Nờu ờ cho tớnh ca M,N thi ta s dng du = B BI TP TRC NGHIM I CP 1 Cõu 1: Thớ nghim vi ỏnh sỏng n sc cua Niu-tn nhm chng minh A s tn tai cua ỏnh sỏng n sc Trang 12 B lng kớnh khụng lam... sỏng cua cỏc bc xa Cõu 29 Trong TN giao thoa khe Iõng Chiờu ng thi ỏnh sỏng co bc song 1=0,66àm va ỏnh sỏng co bc song 2 thi võn sỏng bc ba ng vi 2 trựng vi võn sỏng bc 2 cua bc song 1 Bc song 2 bng a 0,44àm b 0,54àm c 0,75àm d khụng tớnh c Cõu 30.Thc hin giao thoa ỏnh sỏng bng hai khe Young cỏch nhau 0,8 mm, cỏch man 2,4 m Ngun sỏng phỏt ng thi hai bc xa n sc 1 = 0,42àm va 2 = 0,64 àm Tai v trớ nao sau... khe ờn man D = 2m Nờu chiờu ng thi hai khe sỏng Trang 20 bng hai bc xa co bc song 1 = 0, 6 à m va 2 = 0,5à m thi trờn man co nhng v trớ tai o co võn sỏng cua hai bc xa trựng nhau goi la võn trựng Tớnh khoang cỏch nh nht gia hai võn trựng A 0,6mm B 6mm C 6 à m D 0, 6à m Cõu 32 Thc hin giao thoa ỏnh sỏng bng hai khe Young cỏch nhau 0,8 mm, cỏch man 2,4 m Ngun sỏng phỏt ng thi hai bc xa n sc 1 = 0,42àm... Xột iờm M trờn man, luc õu la võn sỏng bc 4, nờu lõn lt giam hoc tng khoang cỏch S1S2 mụt lng a thi tai o la võn sỏng bc k va bc 3k Nờu tng khoang cỏch S1S2 thờm 2a thi tai M la A võn tụi th 9 B võn sỏng bc 9 C võn sỏng bc 7 D võn sỏng bc 8 Cõu 36 Trong thớ nghim giao thoa ỏnh sỏng Y-õng, ngun S phỏt ng thi ba bc xa co bc song 1 = 400nm; 2 = 500nm; 3 = 750nm Trong khoang gia hai võn sỏng gõn nhau... dng N Khi ờlectron chuyờn vờ cỏc qu ao dng bờn trong thi quang ph vach phỏt xa cua ỏm nguyờn t o co bao nhiờu vach? A 3 B 1 C 6 D 4 Cõu 34 ( H C nm 2010)Khi ờlectron qu ao dng th n thi nng lng cua nguyờn t hirụ c tớnh theo cụng thc - 13,6 (eV) (n = 1, 2, 3,) Khi ờlectron trong n2 Trang 29 nguyờn t hirụ chuyờn t qu ao dng n = 3 sang qu ao dng n = 2 thi nguyờn t hirụ phỏt ra phụtụn ng vi bc xa co bc... N0e-t Trong o N0 la sụ nguyờn t ban õu cua cht phong xa N la sụ nguyờn t cht y thi iờm t la hng sụ phong xa Chu ki bỏn ra T la ai lng c trng cho cht phong xa, c o bng thi gian qua o sụ lng hat nhõn con lai la 50% (ngha la phõn ra 50%), c xỏc nh bi: T = ln 2 0, 693 = 4 ng dng ca ng v phong xa Ngoai cỏc ng v co sn trong thi n nhiờn goi la cỏc ng v phong xa t nhiờn, ngi ta con tao ra c nhiờu ng v phong... mụi trng trong suụt cang dai thi chiờt sut cua mụi trng cang ln D Chiờt sut cua cỏc mụi trng trong suụt khỏc nhau ụi vi mụt loai ỏnh sỏng nht nh thi co giỏ tr nh nhau Cõu 35: Chon cõu sai trong cỏc cõu sau: A Chiờt sut cua mụi trng trong suụt nht nh ph thuục vao bc song cua ỏnh sỏng sc Trang 16 B Chiờt sut cua mụt mụi trng trong suụt nht nh ụi vi ỏnh sỏng co bc song dai thi ln hn ụi vi ỏnh sỏng co bc... NG HT NHN - CHT PHểNG X a Sụ nguyờn t cht phong xa con lai sau thi gian t - N = N 0 2 t T = N 0 e- l t vi No = m0 NA A va N = m NA A * Sụ hat nguyờn t b phõn ra bng sụ hat nhõn con c tao thanh : - t D N = N 0 - N = N 0 (1- 2 T ) t b Khụi lng cht phong xa con lai sau thi gian t: m = m0 2- T = m0 e- l t - t * Khụi lng cht b phong xa sau thi gian t : D m = m0 - m = m0 (1- 2 T ) Trong o: N0, m0 la sụ nguyờn