It means without light. Like luminary means with much light.
The Earth is non-luminous, meaning it does not produce its own light. The light we see on Earth comes from sources such as the Sun, the Moon, and artificial lighting.
A TV, when it's on and showing an image is luminous. When it's off, it's non luminous.
It's non-luminous
Non luminous materials do not emit light that we can see. Most elements that are not radioactive fall into this category. Non luminous bodies are those which do not produce their own light. For example: moon etc.
Non-luminous refers to objects or substances that do not produce light on their own. These objects rely on an external light source to be visible, as they do not emit their own light. An example of a non-luminous object is a table.
It is luminous
If the bulb is switched off, then we would call it non-luminous.
the types of non-luminous are bulb,candles ect
-A non-luminous flame is when the air hole of the Bunsen burner is closed but a luminous flame is produced when the air hole is opened.-A luminous flame has an outer of orange colour and an inner of blue. A non-luminous flame has an outer of blue and an inner of orange.-A luminous flame produces soot while a non-luminous does not produce soot.-A luminous flame is weak and unsteady. A non-luminous flame is strong and steady.-A non-luminous flame is very hot while a luminous flame is not too hot.
A flashlight can be both luminous and non-luminous at the same time if it is turned on in a well-lit room. The flashlight itself emits light (luminous) while the ambient light in the room also contributes to the overall illumination (non-luminous).
Bodies which emit light are luminous bodies and those who don't emit light are known as non luminous bodies Example - stars are luminous bodies while planets are non luminous bodies Tube light is a luminous body while a chair is non luminous
A flashlight is luminous when it is turned on and emitting light. It is non-luminous when it is turned off and not emitting any light. So, a flashlight can be both luminous and non-luminous at different times depending on its operational state.