w is a vector, so how can we calculate a scalar divided by a vector? By the way, in slide 37 I think w is a scalar so here what's this vector w's relation to it?

@echo Here the $d\omega$ still refers to the steradian.

w is a vector, so how can we calculate a scalar divided by a vector? By the way, in slide 37 I think w is a scalar so here what's this vector w's relation to it?

@echo Here the $d\omega$ still refers to the steradian.