Answer:
1. Violet
2. Red
3. Violet
4. Red
5. Red has a lower frequency (longer wavelength) than green, red has a lower frequency (longer wavelength) than violet
6. Red has a longer wavelength (lower frequency) than the green. red has a longer wavelength (lower frequency) than violet.
7. Frequency and wavelength are inversely proportional to each other. The wave with the greatest frequency has the shortest wavelength. Twice the frequency means one-half the wavelength. For this reason, the wavelength ratio is the inverse of the frequency ratio.