laws Graceli categories for photo-electric effect:


1. The emitted electrons have random and indeterminate initial velocities, as well as random fluxes, are independent of the intensity of the incident light, but depend on their frequency;


2. The total number of electrons emitted is not only proportional to the intensity of the incident light. but also depends on the types of light [photons, lasers, masers, incandescent radiation, neons, and others, but also depends on the categories [types, levels, potentials, time of energy action, isotopes, states, and phenomena containing the materials.