Why is the ratio of the velocities of light of wavelengths 4000Å and 8000Å in vacuum 1:1

1. Why is the ratio of the velocities of light of wavelengths 4000 Å and 8000 Å in vacuum 1:1?
2. Which of the above wavelengths has a higher frequency?

Answer:

1. In vacuum their speed/velocity is the same.
2. 4000 Å has higher frequency.