Question

wavelength analysis
prussian blue
prussian blue is a dark blue, nearly purple
dye used in many applications from
painting to medicine. it was an accidental
discovery and the first synthetically made
dye.

use this information and the color wheel
to help answer the question.

what wavelength range is appropriate to
use for spectroscopic analysis?

around 600 nm
around 400 nm
around 450 nm
around 480 nm

Explanation:

Spectroscopic analysis uses the complementary color of the observed substance. Prussian blue (dark blue/purple) has a complementary color in the yellow-orange range, which corresponds to the 560-600 nm to 600-640 nm wavelength band, centered around 600 nm.

Answer:

around 600 nm