Consider a black body of surface area 20.0 cm2 and temperature 5 000 K. (a) How

Question

Consider a black body of surface area 20.0 cm2 and temperature 5 000 K. (a) How much power does it radiate? (b) At what wavelength does it radiate most intensely? Find the spectral power per wavelength at (c) this wavelength and at wavelengths of (d) 1.00 nm (an x- or ? ray), (e) 5.00 nm (ultraviolet light or an x-ray), (f) 400 nm (at the boundary between UV and visible light), (g) 700 nm (at the boundary between visible and infrared light), (h) 1.00 mm (infrared light or a microwave) and (i) 10.0 cm (a microwave or radio wave). ( j) About how much power does the object radiate as visible light?

Explanation / Answer

7.09 *10^4 580 nm 21.35 KW

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