Description
Calculate the temperature of the object that emits blackbody radiation with the following peak
wavelengths:
(a) 1.5 mm (1 m = 103 mm)
(b) 3.1 µm (1 m = 106 µm)
(c) 5.4 nm (1 m = 109 nm)
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Explanation & Answer
Using Wien's displacement law : max. wavelength * T = b (Wein's displacement constant = 2.898*10^-3 m.K)
therefore, T = b / max. wavelength , where T (K), wavelength (m)
a) T = 2.898*10^-3 / 1.5*10^-3 = 1.93 K
b) T = 2.898*10^-3 / 3.1*10^-6 = 934.8 K
c) T = 2.898*10^-3 / 5.4*10^-9 = 536,666.7 K
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