Nonspecific fever. Kids infected with coxsackievirus usually establish an unexpected fever that lasts about 3 days. Often the fever comes in two waves â it is there for a day or two, disappears for a couple of days, then returns for about 3 days.
Albert Einstein proposed the idea the light exists of quanta of energy that he called photons.
Only a certain number of electrons can be in an energy level at the same time. The photon shown in the graphic can be considered a small bundle of energy (For more information on atoms, you may want to review the materials on magnetism.)