What makes phosphors glow?

Question

Quizplus · Accepted Answer

Phosphors can be excited to emit light by either electron impacts or irradiation with UV. In both cases, energy is transferred to the phosphor material, which causes electrons to jump to higher energy levels. When the electrons return to their lower energy levels, they release energy in the form of photons, which we perceive as light. Plasma discharges do not directly cause phosphors to glow, but they can be used to excite phosphors indirectly by producing UV radiation that the phosphors can then absorb.

What Makes Phosphors Glow