Question

what is luminous and non luminous

Answer 1

In order for us to see an object that is non-luminous, it must reflect some of the light it receives from a luminous source, such as the Sun. Most of the objects we see, such as cars, clouds or even the Moon, are not luminous; it is just that they reflect sunlight.

Answer 2

luminous means which emits light energy and non luminous which doesn't emit light energy