What is the energy of a photon with a frequency of 1.7 × 1017 hz?   planck’s constant is 6.63 ×  10–34  j•s.1.1 ×  10–17  j  1.1  ×  10–16  j8.3  ×  10–16  j8.3  ×  10–15  j

The energy carried by a single photon is given by

where h is the Planck's constant and f is the frequency of the photon.

The photon of our exercise has a frequency of , therefore its energy is

stands for electromotive force and it is measured in volts. despite its name, it is not actually the force in the sense of being a "pushing" or "pulling" (not measured in newtons).an equation that relates emf,  ℰ,  to a battery's terminal voltage, v, current, i, and internal resistance, r, is    ℰ = v + irin this case, the emf can be interpreted as a voltage—a difference in electric potential.i would not say that it would be considered an energy. if emf can be defined as the energy/work per a unit charge from a battery or other electric source, then it is not strictly energy.