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Chng 10: C S L THUYT V BC X

10.1 Khi nimcbnvbcxnhit

10.2 Cc nhnghacbncabcxnhit

10.3 Cc nhlutcbncabcxnhit

10.4 Bcxcht kh

10.5 Cngc bi v kt thc

10.6

Hng

dn

t

lc

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10.1 Khi nimcbnvbcxnhit

Trao inhitbcx l hintng trao inhitgiavt pht bcx v vthpthbcxthng qua mi trngtruyn sng int.

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10.2 Cc nhnghacbncabcxnhit

Khi tia sng int mang nnglng Q chiu vo

bmtvt,vtshp thmtphnnng lng (QA)bin thnh ninng,mtphnnng lng (QR) bphn x theo tia phnx v phnnng lng cn li(QD) struyn xuyn qua vt ra mi trng khc theo

tia khc x.

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Phng trnh cn bngnnglngs l:Q = QA+ QR+ QD

Ta gi:

QA/Q l A: hshpthQR/Q l R: hsphnxQD/Q l D: hs xuyn qua

Nu: A = 1: Vtentuyti R = 1: Vttrngtuyti D = 1: Vt trong tuyti

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3.1. nh lut Planck

10.3 Cc nhlutcbncabcxnhit

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3.2. nh lut Stefan-Boltzmann

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3.3. nh lut Kirrchoff

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4.1. c im cht x v bc x cht kh

10.4 Bcxcht kh

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4.2. nh lut buoger v en cht kh

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4.3. Tnh bc x cht kh