It would have to be c because it is a chemical change. your welcome!!!!!
The change in distance is 30 because if you subtract both number you'll get 30
Answer: SATURATED
Explanation:
When a solute can no longer be dissolved it is considered "saturated" as is.
You need to use Planck's law:
E = h·υ = (h·c)/λ
Without making all the calculations, a fraction is bigger than another when the denominator is smaller. Therefore you need to find the smallest wavelength (λ) which is 450nm.
You could also be helped by colors: in order of decreasing energy, you have blue - green - yellow - red.
In any case, the correct answer is a).