Exitance is defined as the power per unit area that is emitted from the surface

Question

Exitance is defined as the power per unit area that is emitted from the surface of an object. For a blackbody radiator, the exitance emitted is dependent upon its temperature. Calculate the exitance (in W/cm2) for a blackbody radiator at 74 K and 3.30 × 102 K.

Exitance is defined as the power per unit area that is emitted from the surface of an object. For a blackbody radiator, the exitance emitted is dependent upon its temperature. Calculate the exitance (in W/cm2) for a blackbody radiator at 74 K and 3.30 x 102 K. Number 3260 Exitance at 74 K W/ cm Number Exitance at 3.30 x 10 k 6.72 x 10 14 w cm. Incorrect There is additional feedback available! View this feedback by clicking on the ottom divider bar. Click on the divider ar again to hide the additional feedback. Close

Explanation / Answer

Q/A = 5.67*10-8* T4

at 74 K, Q/A= 5.67*10-8*(70)4=1.36 Wm2= 1.36*10-4 W/cm2

for T= 3.30*100

Q/A = 5.67*10-8*(3.30*100)4=672.4 W/m2= 672.4*10-4 W/cm2

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