D. Phti thude ca ba yéu td neu tren.
MAT CAC DUNG CU QUANG
31.14. Mdt cua mdt ngudi cd didm cue vidn vd ctic can cdch mdt ldn lugt la
0,5 m va 0,15 m.
a) Ngudi nay bi tat gi vd mdt ?
b) Phai ghep sat vdo mdt thdu kfnh ed đ tu bao nhieu đ nhin thdy vat dat cdch mdt 20 m khdng didu tidt ?
31.15. Mdt ngudi dflng tudi nhin rd duge eae vat d xạ Mudn nhin rd vat gdn nhdt each mdt 27 cm thi phai deo kfnh + 2,5 dp cdch mdt 2 em.
a) Xac dinh cac didm C^ va Cy eua mdt.
b) Ndu deo kfnh sat mdt thi cd thd nhin rd cdc vat d trong khoang nao ? 31.16. Mat cua mdt ngudi can thi cdf didm Cy each mdt 20 em.
a) Dd khdc phuc tat nay, ngudi đ phai deo kfnh gi, đ tu bao nhieu đ nhin rd ede vat d xa vd cflng ?
b) Ngudi nay mudn dgc mdt thdng bdo each mdt 40 cm nhung khdng co kfnh can ma lai sfl dung mdt thdu kfnh phan ki cd tieu eti 15 em. Dd doc dugc thdng bao tren ma khdng phai didu tidt thi phai dat thdu kfnh phan ki each mdt bao nhieu ?
Bai 32. KINH LUP
32.1. Ghep mdi ndi dung d edt ben trdi vdi ndi dung tuomg iing d edt ben phaị 1. Cdc dung eu quang đu ed
tdc dting
2. Dai lugng dac trung cua cdc dung eu quang la
3. Kfnh lup duge edu tao bdi 4. Dd'i vdi kfnh lup, vat phai cd
vi trf
a) sd bdi gidc hay cdn ggi la sd phdng dai gdc.
b) thdu kfnh hdi tu hay hf ghep tuomg duong mdt thdu kfnh hdi tu tieu cu vdi xentimet.
e) d ben trong doan tfl quang tam kfnh đn tieu didm vat ehinh. d) tao anh eua vat cd gdc trdng ldn
hom gdc trdng vat nhidu Idn. e) dua anh cua vat vao trong
khoang nhin ro cua mdt.
• Xet cac ydu td sau khi quan sat mpt vat qua kfnh lijp : (1) Tieu cu ciia kfnh lijp.
(2) Khodng cUc can OC^ cGa mat. •*
(3) Dp Idn cCia vat.
(4) Khoang each tfl mat den kfnh.
32.2. Sd bdi gidc eua kinh lup ngdm chflng d vd cue phu thude cac ydu td nao ? Ạ (l) + (2). B. (l) + (3).
C. (2) + (4). D. (1) + (2) + (3) + (4).
32.3. Sd bdi gidc cua kfnh lup ngam ehiing d diem ctic can khong phu thudc
(cac) yeu td ndo ?
Ạ(l). B.(3). C. (2) + (3). D. (2) + (3) + (4). '
32.4. Trong trudng hgp ngdm chflng nao thi sd bdi giac cua kfnh lup ti If nghich vdi tieu eti ?
Ạ O vd cuẹ B. O didm cue vidn ndi chung. C. O didm ctic can. D. 6 vi trf bat kị
32.5. Mdt kfnh lup ed ghi 5x tren vanh cua kfnh. Ngudi quan sat cd khoang cue
cam OCf. = 20 cm ngdm chflng d vd cue đ quan sdt mdt vat.
Sd bdi giac cua kfnh cd tri sd nao ?
Ạ 5. B. 4. C. 2. D. KhacA, B, C.
32.6. Mdt ngudi dting tudi khi nhin nhiing vat d xa thi khdng phai deo kfnh nhung khi deo kfnh cd đ tu 1 dp thi dgc duge trang sach dat each mdt gdn nhdt la 25 cm (mdt sat kfnh).
a) Xae dinh vi trf cua cdc didm cue vidn va ctic can cua mdt ngudi naỵ b) Xde dinh do bidn thien eua đ tti mdt ngfldi nay tfl trang thai khdng didu tidt đn didu tiét td'i dạ
c) Ngudi nay bd kfnh ra vd dung mdt kfnh lup cd do tu 32 dp de quan sat mdt vat nhd. Mdt cdch kfnh 30 cm. Phai dat vat trong khoang nao trudc kfnh ? Tfnh sd bdi gidc khi ngdm ehiing d vd cuẹ
32.7. Mdt ngudi ed khoang cue can OC^ = 15 em va khoang nhin rd (khoang
cdch tfl didm cue can đn didm cue vidn) la 35 cm.
Ngudi nay quan sat mdt vat nhd qua kfnh lup cd tieu eii 5 cm. Mdt dat cdch kfnh 10 cm.
a) Phai dat vat trong khoang nao trudc kfnh ?
b) Nang sudt phan li cua mdt ngudi nay la 1'. Tfnh khoang each ngdn nhdt gifla hai didm tren vat ma mat ngudi nay cdn phan bift dugc khi ngdm chflng d didm cue can.
32.8. Mdt ngudi cam thi cd didm cue vidn each mdt 50 em.
a) Xdc dinh do tu cua kfnh ma ngudi nay phai deo đ (:d thd nhin rd mdt vat d xa vd cflng khdng didu tidt.
b) Khi deo kfnh, ngudi nay cd thd dgc dugc trang sach cdch mdt gdn nhdt la 20 em (mdt sdt kfnh). Hdi didm cue can cua mdt each mdt bao xa ? c) Dd dgc dugc nhiing đng ehfl nhd md khdng phai didu tidt, ngudi nay bd kfnh ra vd dflng mdt kfnh lup cd tieu eu 5 em dat «dt mat. Khi đ phai dat trang sdch each kfnh lup bao nhieu ?
Bai 33. KINH HIEN VI
33.1. Ghep mdi ndi dung d edt ben trdi vdi ndi dung tuong flng d cdt ben phaị 1. Kfnh hidn vi la quang cu hd trg
cho mat cd sd bdi giac
2. vat kfnh eua kfnh hidn vi cd thd coi la mdt thdu kfnh hdi tu
3. Thi kfnh eua kfnh hidn vi eung la mdt thdu kfnh hdi tu
4. Do đi quang hgc eua kfnh hidn vi la
a) khoang each tfl tieu didm anh
chfnh F[ ciia vat kfnh đn tieu
didm vat chfnh F2 cua thi kfnh. b) cd đ tu rdt ldn khoang hdng
tram didp.
e) ldn hon rdt nhidu so vdi sd bdi gidc cua kfnh lup.
d) ed tieu eu vai xentimet vd cd vai trd cua kfnh lup.
e) tao anh that cua vat ngugc ehidu, Idm hon vat.
33.2. Khi didu chinh kfnh hidn vi ta thue hifn each nao kd sau ? Ạ Ddi vat trude vat kinh.
B. Ddi dng kinh (trong đ vat kfnh va thi kfnh dugc gdn chat) trudc vat. C. Ddi thi kfnh so vdi vat kfnh.
D. Ddi mdt d phfa sau thi kfnh.
33.3. Trong trudng ndo thi gdc trdng anh cua vat qua kfnh hidn vi ed tri sd khdng phu thude vi trf mdt sau thi kinh ?
Ạ Ngdm ehiing d didm cue can.
C. Ngdm chflng d vd cuẹ
D. Khdng cd (gdc trdng anh ludn phti thude vi trf mdt).