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.
Definition [edit]. In 1924 a French physicist Louis de Broglie assumed that for particles the same relations are valid as for the photon: where and are the energy and momentum of the photon, and are the frequency and wavelength of the photon, is the Planck constant, is the speed of light.From this we obtain the definition of the de Broglie wavelength through the Planck constant and the relativistic momentum of the particle:hus, we determine the main features associated with the wave-particle duality â if the energy of internal standing waves in the particles reaches the rest energy of these particles, then the de Broglie wavelength is calculated in the same way as the wavelength of photons at a corresponding momentum.