State: (a) The S.I. unit of the intensity of a blackbody radiation. (b) Two features...
PHYSICS
WAEC 2022
State:
(a) The S.I. unit of the intensity of a blackbody radiation.
(b) Two features of the intensity-wavelength graph of a perfect blackbody at different temperatures.
Explanation
(a) S.l unite for the intensity of a blackbody radiation = Wm-² OR Js\(^{-1}\)m-²
(b) Two features of the graph
i. The shape of the graph is non-symmetric.
ii. Peaks of the intensity have lower wavelengths/Peaks decrease with wavelength.
iii. The line joining the peaks have a negative gradient.
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