The formula to be used in this problem is:E = hν
Where:
ν = frequency in Hz, or s^-1.
From time to time you see E = hf.
h = 6.636 x 10^-34 J.s and is named as Planck's constant.
E = (6.636 x 10^-34 J.s)(3.20 x 10^8 s^-1)= 2.12352 x 10^-25 JThis is the energy of 1 photon.
