I just came across a question in MM that said what is the color of the

[steve357]

I just came across a question in MM that said what is the color of the line separating a black spot from a white background
the answer was color is applied to objects not to backgrounds. i did not understand anything..anybody did?

 

[xmen_psud]

what does MM mean?
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PS: why do we support this forum with Latex for example $\overrightarrow {r_C } = \frac{{\int {\overrightarrow r dm} }}{{\int {dm} }}$
if we have Latex available here, it's more convenient to disscuss

 

[steve357]

Motion Mountain. it's available in pdf and is said to be the best available..