Before presenting the theory about luminous and illuminated bodies, it is important to emphasize a little about light, after all, it is it who defines whether a body is luminous or illuminated.
Previously, it was believed that light was present in the human body and that the eye was responsible for the output of this light.
In summary, it can be said that currently physicists and other scholars on the subject believe that light is formed by the junction of photons and that, therefore, it has a wave nature.
Light has an electromagnetic origin, that is, it is formed by electromagnetic or electrical oscillations.
luminous body
It is a kind of primary light capable of emitting its own light, thus providing illumination for the environment where it is being emitted.
Examples of luminous bodies are: the sun, a candle flame, or even any body heated to a certain temperature can become luminous.
Illuminated Body
These are the bodies that do not have the ability to emit their own light. Enlightened bodies only reflect the light they receive.
E.g.: man, car, a pencil, etc.
By Talita A. angels
Graduated in Physics
Brazil School Team
waves - Physics - Brazil School
Source: Brazil School - https://brasilescola.uol.com.br/fisica/corpo-luminoso-corpo-iluminado.htm