e0
cmo
nuc
vA
DAo
TAo
DAI
HOC
UUP
Hq
ud,t€n
thi
s'inh:.
56 bd,o
danh:
KY
THI
TUYEN
SINH
SAU
DAI HoC
xAvT 2006
M6n
thi: Vdt
li
Ly
thuyct
lrtctng
hat
vi
D),nh

xung luong
tr€n truc
Or cta
mO
chuyOn
dOng
tu
do lb,
nhfrng tich
phAn
chuydn dOng.
CAu 2: Trong
hC
toa dO
cau
(r,0,@),
toan trl hinh chi€u mOmen
xung h-tong
co dang:
^al
L,:-ih^,v6t0<0<.2n.
-d6
1. Tim
tri ri€ng
va ham
ri€ng
chud,n
ho5,
cria to5,n tfr
L".

cira h€ hat boson
dOng nh6t
:
ThOng
k€ Bose-Einstein,
CAu 4:
Cho mQt
he khi ly
tLr6ng.
a) Til
phdn
b6
chinh
tdc
Gibbs,
hay
suy ra
ph6,n
b6
Ma-xwell-Boltzmann
dOi
v6i
h€
dilt
trong
trudng
lr,rc.
b)
Viet
bi€ii

gia
tri tod,n
phudng
trnng
binh,
gi6
tri
c6
x6.c
sr-rAt cuc
dai
ciia
vAn
t6c
klii ly
tudng.
Cho
bi€t
cac
tich
ph6n
(vdi
a
> 0):
1,3
5 (2,
-
1)
/,*
)n

e-o" d"r
-
7(
Arrt+1