Final answer:
The energy in joules per photon of radiation of frequency 7.39 × 10^15 s^-1 is approximately 4.9 × 10^-18 J.
Step-by-step explanation:
According to Planck's equation, the energy of a photon can be determined using the formula E = hf. In this equation, h is Planck's constant which has the value 6.626 × 10-34 J-s, and f is the frequency of the radiation. To calculate the energy in joules per photon, we simply substitute the given frequency of 7.39 × 1015 s-1 into the equation:
E = (6.626 × 10-34 J-s) (7.39 × 1015 s-1)
E = 4.9 × 10-18 J
Therefore, the energy in joules per photon of radiation with a frequency of 7.39 × 1015 s-1 is 4.9 × 10-18 J.