No, the concepts you mentioned are not applicable to photons or electromagnetic waves. The terms "potential energy" and "disappearance" do not directly apply to photons in the context you described.
In physics, potential energy is associated with the position of an object within a force field, such as the gravitational potential energy of an object near the Earth's surface. Photons, as elementary particles of light, do not possess mass and are not subject to gravitational forces in the same way as massive objects. Therefore, the concept of potential energy is not typically applied to photons.
Regarding the curve where the amplitude is maximum, it generally represents the peak or maximum intensity of the wave. In the context of an electromagnetic wave, such as light, the amplitude corresponds to the strength or magnitude of the electric and magnetic fields comprising the wave. However, this does not imply potential energy in the same sense as the gravitational potential energy of an object.
Similarly, the point of inflection in a wave does not indicate the disappearance of photons or the absence of potential. A point of inflection represents a change in the curvature of the wave, where the slope transitions from positive to negative or vice versa. This transition does not signify the disappearance of photons or the absence of potential; rather, it is a characteristic of the shape of the wave.
It's important to note that the behavior of photons is described by quantum mechanics, which involves a different set of principles and concepts compared to classical mechanics. In quantum mechanics, photons are treated as particles and waves simultaneously, and their behavior is described probabilistically by wavefunctions rather than concepts like potential energy and inflection points.