Step 1 : Introduction to the question "What is the common term for electromagnetic radiation visible to the naked human eye?"
...Electromagnetic energy that is visible to the human eye is commonly called light. It is energy emitted by matter that is in some way excited or when matter is hot. The range of energy we can see is only a very small swath of all the energy ranges in the electromagnetic radiation spectrum. Sometimes this energy behaves as a wave and other times it behaves as a particle. Thus, the science of physics considers it a bit of both. The different colors we see indicate how much energy is in the light, from the reds (low energy) to the blues (high energy.) Source: PhysicsForIdiots.com
