Final answer:
To calculate the mass of a photon, use the equation E = hf and then E = mc^2.
Step-by-step explanation:
The mass of a photon can be calculated using the equation E = hf, where E is the energy of the photon, h is Planck's constant, and f is the frequency of the photon.
Given that the frequency is 3.33 x 10^15 Hz, we can use Planck's constant, which is approximately 6.626 x 10^-34 J·s, to calculate the energy of the photon.
Once we have the energy, we can use Einstein's mass-energy equivalence equation E = mc^2 to calculate the mass of the photon.