PHY3063 R. D. Field Department of Physics Chapter3_6.doc University of Florida Black-Body Radiation (1) Consider a body with a surface that has the property of absorbing all the radiation incident upon it (i.e.a = e = 1). Such a body is called a “black body”. The small hole in spherical metallic (i.e.conducting) cavity acts like a “black-body” surface (a = e = 1). Since a = e = 1, 41)(TdtdUATIσ==. Define λdtddUATI1),(=, where I(T,λ)dλis the intensity at temperature Tof the radiation between λand λ+dλsuch that 4),()(TdTITIall==∫. Wien’s Displacement Law: If we plot the intensity versus the wavelength the data show that the
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This note was uploaded on 05/29/2011 for the course PHY 3063 taught by Professor Field during the Spring '07 term at University of Florida.