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- ...falls within a given solid angle. The SI unit of radiance is the watt per steradian per square metre (W·sr<sup>−1</sup>·m<sup>−2</sup>).1 KB (191 words) - 14:26, 5 February 2024
- ...hertz and that has a radiant intensity in that direction of 1/683 watt per steradian.2 KB (291 words) - 05:49, 14 February 2024