2022 WAEC Physics Theory State: (a) The S.I. unit of the intensity of a blackbody radiation. (b) Two features...

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.

(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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