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Lecture 11: Radiometry (44)
youtuyy

Since one nit is one lumen/m^2/sr, I wonder if square meter * steradian gives us something meaningful? Say, could it be a measurement of something?

Zyy7390

My way to think about it is to imagine a square with area A illuminating its surroundings. To measure the "illuminating ability", whose unit is Candela, per unit area of that square, we have to divide the Luminous intensity of the square as a whole by its area A.

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