Final answer:
The energy of a photon is equal to its frequency multiplied by Planck's constant.
Step-by-step explanation:
The energy of a photon is equal to its frequency multiplied by Planck's constant, represented by the equation E = hf. Planck's constant, denoted as h, is a fundamental constant in physics and has a value of 6.626 × 10-34 J·s. By multiplying the frequency of the photon by Planck's constant, we can derive the energy of the photon.