how can you test to see if a light with wavelength 413nm is the same light with a frequency of 6.26*10^14Hz?

2 answers

6.26E14 x 413E-9 = ? and compare with c = 3E8.
distance = speed * time
and
period = 1/f

413 *10^-9 meters ?=?? 3*10*8 m/s / (6.26 * 10^14)

413 * 10^-9 = .479 *10^-6 ????

413 = 478 ???
not really