Trudmg EHSP TP.HCM
KHOA Var Lf pi rrn rfr rH0c Hec pHAN ptr
MOn QUANG HqC
Hqc k) II nEm hgc 2fi)8-2009
Ldp cr? nhfln
Thdi gian 120 phrit
CAu I : Tinh bidu thrtc bi€n itQ dao ttQng tdng hgp g6y bdi 1 khe hgp.
CAu II : Trinh bAy thi nghiQm vd phdn c{c quay td nhi€n .Nguy€n tdc hqat <tQng ctia drrdng kd.
Cffu III : Bii t6an giao thoa :
Thrrc hi€n thi nghiQm Young vd giao thoa 6nh s6ng vdi c6c rh6ng sd sau : kh6ang c6ch gifla
hai ngudn kdt hgp I = lmm,kh6ang cdch tr) ngu6n kdt hgp min quan si{t D = lm.
a.Tr€n mhn kh6ang cdch til v0n sdng bdc 5 b€n niy tldn vdn sdng bflc 5 b6n kia v6n trung t6m, do
ilrlQc li 60mm. X6c ilinh budc s6ng cfia 6nh s6ng rhi nghiQm.
b.Cho Uidt Ud rQng cfia tnrdng giao thoa tr€n mdn li 25mm. Xdc <tinh sd vdn siing vd vdn tdi quan
siit drrOc.
c.Thi nghiQm vdi 6nh s6nh trdng (3800Ao< l. <750040). H6i tai ttidm M tr€n min quan s6t ,c6ch
vAn trung tdm 4mm, c6 nhfrng brlc x4 nio cho vAn tdi?
CAU IV : Bii t6an lttQng ttl r{nh s6ng :
Catot cfia mQt td beo quang ttiQn lim bXng x6di (Cs) c6 gidi h4n quang rtiQn li 6570A0
a.Tim c6ng th6at electron.
b.Tim vQn tdc ban ttdu c{c d4i cta electron khi chidu 6nh sdng c6 brJdc s6ng 444040.
c.Tim hiQu tliQn thd hem dd tctrOng c6 elecrron v6 andt.
(khong srldsng tii liQu , ,b.,n I .4l,lc!
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