Cdu 17: Trong quang pho cua nguyen tuf hidro, neu biet h\idc song dai nhat cua vach quang pho trong day Laiman la X, i va h\i6c song cua vach ke vdfi no trong day nay la ^2 thi h\idc s
Trang 1cu
Giai nen W = Wd + Wt O Wt = W - Wa
cu' L I ' L I '
2 2
Vay chgn dap an D
Cdu 17: Trong quang pho cua nguyen tuf hidro, neu biet h\idc song dai
nhat cua vach quang pho trong day Laiman la X, i va h\i6c song cua
vach ke vdfi no trong day nay la ^2 thi h\idc song cua vach quang
pho trong day Banme la:
A (X,-^,)- B c + D
Giai Difa vac scf do chuyen mufc nSng
Iifpng, ta c6:
hfi = E i - E o (1)
hf2 = E2 - Ee (2)
hf„ = E2 - E l (3)
TrCf ve vdi ve (2) va (1) ta difpc:
hf„ = hf2 - hfi
1-v he ^ he he he
Vi hf = — nen — = =>^„ =
E 3
-
E2E i
-
Eo-K
Vay chgn dap an B
Cdu 18: Phat bieu nao sau day la s a i khi noi ve dao dong cua con iSc
dcfn (bo qua liic can cua moi triTdng)?
A Vdri dao dong nho thi dao dong cua con lac la dao dong dieu h6a
B K h i vat nang d vi tri bien, cd nang cua con lac bang the nang
cua n6
C Chuyen dong cua con iSc tCf vi tri bien ve vi tri can bang la
nhanh dan
D K h i vat nang di qua vi tri can bang, thi trong I L T C tac dung len
no can Vlng vdi life cSng cua day
Giai Chi l e t d6 thi TS DH, CD Mdn V$t If 9