SIJ DUNG PHUONG P H A P HOAT NGHIEM TRONG DAY HOC VAT LJ ff TRUNG HOC PHO THONG O PGS, TS, PHAM XUAN Q U ^ ThS CAO TI^N KHOA" 1 Mdt sd khd khdn h ong dqy hqe (DH) Ndl dung eua PPHN Id Khi chilu sdng v[.]
SIJ DUNG PHUONG P H A P HOAT NGHIEM TRONG DAY HOC VAT LJffTRUNG HOC PHO THONG O PGS, TS, PHAM XUAN Q U ^ - ThS C A O TI^N KHOA" Mdt sd khd khdn h-ong dqy hqe (DH) mdn V6t li d h-ung hoc phd thdng Trong DH cdc kiln thue vqt If thudc chuong trinh trung hoc phd thdng, cd nhilu qud trinh dlln ro rdt nhonh nhu: doo ddng tudn hodn, sy lan huyin sdng, hien hrang giao thoa sdnq co, sy roi h/ Cdc thf nghidm duqc trinh bdy tr§n CO sd quon sdt, dqc bdng thye nghifm Tuy nhi§n, cdc qud trinh ndy diln ro nhonh nIn khd ed thi quon sdt duqc h-qng thdi cuo doi hiqng cdn nghign cuu Hi§n nay, vdl vl§e su dyng ede dyng cy gidn Hip, phuong dn thf nghiim dd phdn dnh duqc bdn chdt eua cdc hien hiqng vdt If vd ed tdc ddng h'ch cue \d\ hieu qud DH Trong qud trinh DH phdn sdng co, hoc sinh (HS) dd duqc quon sdt hi?n h/qng giao thoa song bdng thye nghiem, Ndl dung eua PPHN Id: Khi chilu sdng vdt thi dong chuyin ddng hjdn hodn bdng ngudn sdng khdng ll§n Kie, ngdt qudng (chdp sdng), tdn sd chdp sdng duqc chqn soo eho mdt ^^9 chi nhin thdv vdt thi nhu dung ySn tqi cho Dilu ndy xdy chu ki chdp sdng bdng nodt sd nguyin jdn ehu ki chuyin ddng tudn hodn cuo vdt Khi tdn sd chdp sdng du k^ (tuong ung tdn sd cuo chuyin ddng hjdn hodn Idn), dnh sdng tu din HN chf ehllu dung vdo thdi diem vqt d mqt hong cdc thdi (pho), mdt se cd cdm gidc nhin ^^y ^h^p sdng vd v6t nhu dung Iqi d h-qng thdi ^idy Khi tdn sdcdc chdp sdng eua ngudn HN sol ^^^ ^gj | y ^ g nhd vdi tdn sd hidn hodn cuo vdt, ^^ ^ ^^ ^^ ^ , |^„ ^^dp sdng, vat dich chuyin ^.^ ^^^^ ,^ ^ ^^ ^ ^j ^ ^ ^ ^ ^^ '^ ^^^ ^ ^^^ ^.^^ ^^^ ^^ , ^ ,^, , ^ ^^^ h/y nhien, cac ket ouo mo chi dung Iqi d vi^e quon sat so bo ma chua may duoc t)dn chat cua ^, ,.^ ^ • ll' iL-* L • coc hien tuong vot ll, cu me nhu sou: DL-• lil '• uc ' I J Pnon g/oo moo song ca; HS quon sot duoc mdt nude iXl cd hien tu^g gioo thoo se ed dong ede dudng hypebol Tuy nhien, kiln thuc quon nhd't Id hong miln gioo thoa cd cdc dilm ludn d h-ong thdi doo ddng vdl bien dd khdng ddi, cdc dilm khde nhou se cd bien khde nhou, thoy ddi h> tdi bien cue dai thi HS loi khdna quon sdt duqc (chi duqc thua nhdn su dyng If thuylt d l gidi thfeh) Phdn sdng dung: HS quon sdt duqc hl§n h/qng xudt hien cdc nut, byng bdng thye nghi§m Cdc kit qud thu nhdn duqc chung td h-ong hlln h/qng sdng dung khdng ed sy truyln dao ddng, phdn ddy khodng hoi nut lien tllp ludn doo dqng cung vdl nhou thdy vdt nhu chuyin ddng chdm lai (hinh dnh bllu ,.y i_ j _ - / , "^ 4« ' -» L « ', L kien cho thay vat chuyen ddng tuan hoon vol ehu I.L.-? I.-' I L I I ' '•' L I J » L«"