A laser emits light of frequency 4.74 × 10^14 s-1
-The blue color of the sky is due to the scattering of sunlight by air molecules. Blue light has a frequency of about 7.5 × 10!" 𝐻𝑧. Calculate the length of
wave, in nm, associated with this radiation.
-Calculate the frequency and energy of blue light that has a wavelength of 400
nm.