# Color transition [closed]

We have to determine which method is true in order to find which color is absorbed and which one is transmitted?

I have read in an example that $\ce{Cu^{2+}}$ absorbs red light but transmits blue.This is true if we see pyramid but not with respect to circle....How could we make jugdement in exams while solving mcq related to it?

## closed as unclear what you're asking by paracetamol, Todd Minehardt, M.A.R., airhuff, ronApr 25 '17 at 16:02

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