Recently I learned in E&M the nature of creation of electromagnetic radiation, specifically in the context of an accelerating charge, as a ripple in the field. My quarrel is this: We can measure the electric field surrounding a point charge from an infinite number of points; the field is entirely continuous in nature. Where then, does the wavefront transform from a uniform change at all equal radii to separated packets of discrete energy? I am missing where the continuous field becomes non-continuous. My professor says that the discreteness is a result of the uncertainty principle, but that doesn't explain the mechanism for me. Is the detection of a photon perhaps the consequence of a necessary discrete energy absorption from the continuous field, instead of a necessary discrete production? I realize I may have several misconceptions, thank you for your patience and insight.