The wavelength of light is given as 463 nm or can also be written as 463 x 10^-9 m. [wavelength = ʎ]
We know that the speed of light is 299 792 458 m / s or approximately 3 x 10^8 m / s. [speed of light = c]
Given the two values, we can calculate for the frequence (f) using the formula:
f = c / ʎ
Substituting the given values:
f = (3 x 10^8 m / s) / 463 x 10^-9 m
f = 6.48 x 10^14 / s = 6.48 x 10^14 s^-1
f = 6.48 x 10^14 Hz