Light has a wavelength of 550 nm in a vacuum. It then enters a medium of index of refraction 1.70.
A) What is the frequency of this light in the vacuum?
B) What is its frequency in the medium?
C) What is its speed in the medium?
D) What is its wavelength in the medium?
E) What was the percent change in wavelength as the light went from the vacuum into the medium?