HCM KHoA vAr rY lop cOrvnAN ur on rru Hec xi r NAU Hec 2ooe -2olo Ấ'A MON: VAT LY THONG KE Cffu I: 6 aidml Nhiet dung riOng cria vdt rin theo thuytit Debye: ạ Co sd lli thuyOt.. Cffu III
Trang 1Krr DHSP TP HCM
KHoA vAr rY
lop cOrvnAN ur
on rru Hec xi r NAU Hec 2ooe -2olo
Ấ'A MON: VAT LY THONG KE
Cffu I: 6 aidml
Nhiet dung riOng cria vdt rin theo thuytit Debye:
ạ Co sd lli thuyOt
b 56 trqng thAi (s6 s6ng) c6 dn s6 trong khodng (v,
c Nhiet dung
Ciu II: (3 di€m)
Bric xa cdn bing - Khi photon: C6c dfnh luQt bric x4 cin bdng
Cffu III: (2diem)
Tu phdn bi5 Maxwell c6 di6n eOi vOi mQt h4t ktrOi luqng m,6 nhiQt dQ T,
cta tlQ l6n xung luqng)
Cffu IV: (2 diem)
p5i vOi kh{ electron trong thii tich V 6 tr4ng th6i hodn todn suy biiln (<tq kh6ng tuyet d6i), hdy x6c dinh:
s0 trang th6i dO(e) c6 ning luong trong khoing (a, e + de), ndng lugng todn phAn Ẹ Bi6t xung Iuong vd nlng lugng cira m6t electron thoa hQ th['c: s = cp (trud'ng hgp si€u tuong d5i tinh, c: v4n t5c
6nh sdng).
T=:
,+ar).&
:ri ::
l)
M
F (trung binh