Krr

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on rru Hec xi r NAU Hec 2ooe -2olo MON: VAT LY THONG KE

Cffu I: 6 aidml Nhiet dung riOng cria vdt rin theo thuytit Debye:

DHSP TP. HCM KHoA vAr rY lop cOrvnAN ur

T=:

,+ar).&

:ri

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a. Co sd lli thuyOt. b. 56 trqng thAi (s6 s6ng) c6 dn s6 trong khodng (v, c. Nhiet dung.

l)

F (trung binh

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 (

Ld +t"y 0a QuU

{cog - oto4o

?frrt

tuong d5i tinh, c: v4n t5c

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