Question

Within the visible spectrum, our experience of red is associated with ________. shorter wavelengths intermediate wavelengths wavelengths of indeterminate length longer wavelengths

Answer 1

Within the visible spectrum, our experience of red is associated with
the longest wavelengths visible to our eyes. 

Our experience of violet is associated with the shortest wavelengths
visible to our eyes.

And all the other colors are associated with the wavelengths that are
intermediate between those two extremes.