Hardly ever.
you really can't unless you leave it in the dark for a long time it then starts to loose it's glow
At first light it DOES sound a bit confusing. First, the definition of the term 'NON-LUMINOUS'; 'Not capable of PRODUCING light but can be capable of REFLECTING light from another source'. For instance, our MOON is NON-LUMINOUS as it REFLECTS light from the Sun. The SUN is LUMINOUS as it produces light that is REFLECTED off the surface of the moon. And so, LUMINOUS means capable of PRODUCING light. Now closely examine your flashlight. The BATTERIES produce electrical energy which is transferred to the BULB which emits light, thus LUMINOUS. The tiny little BULB emits quite a lot of light for its small size. However, the bulb is contained within a concave silvered cone which REFLECTS,(NON-LUMINOUS) gathers and channels the emitted light from the BULB (LUMINOUS) into a BEAM which ILLUMINATES whatever you are pointing the flashlight at. Our cameras would be just paperweights if there were no NON-LUMINOUS surfaces for the light to REFLECT off of, back into the camera lens, onto the 'plate' thus etching the image. For example, take a photograph in the dark without the flash and what do you get. No LUMINOUS, no NON-LUMINOUS. And so there we have LUMINOUS and NON-LUMINOUS, ILLUMINATING our lives. Enjoy! :)
Luminous means "giving off light", or glows in the dark (since luminosity is detected by the eyes, it usually refers to the visible part of the electromagnetic spectrum). Many materials emit a wide range of radiation other than visible light, which is why some radioactive materials were used as glow in the dark paints, and why the Curies focused on a particular radioactive isotope (because it glowed in the dark). Some materials can even store energy from visible light and emit it later, which is why some of my luminous objects have to be "charged" by a light bulb or the sun. Some chemical combinations can emit light for a while, such as the stuff in lightning bugs, which we can replicate in production lines to make glow sticks. Non luminous materials do not emit light that we can see. Most elements that are not radioactive fall into this category.
If the bulb is switched off, then we would call it non-luminous.
Planets( Mercury, Venus, Earth, Jupiter, Saturn, Uranus, Neptune) and also Moons are Non-Luminous objects they don't emit light. The reason we see them because they reflect light from the Sun.
Yes.
No, glow in the dark stars are not considered luminous objects. They are phosphorescent, meaning they absorb light and then slowly release it in the form of glowing light. Luminous objects emit their own light, while phosphorescent objects like glow in the dark stars require an external light source to charge their glow.
well luminous means shining or glowing, so it means that shes not a glowing celestial object.
Luminous.
Luminous colours are bright and kind of glow in the dark like a hivise and these are the luminous colours: luminous pink Green Yellow Blue Orange
bright, luminous, big, bold, empowering, glowing, floestent, beautiful, wondrous
dark
No, radium does not glow in the dark. If it did, then the whole world would be glowing in the dark. Rocks, soil, plants, and any living thing contains some radioactive material. The myth can be traced back to the "radium craze" of the early 20th century, when radium was just about added to everything. When the radium was added to paint, it became luminous. This was the origin of the "radium glow". In fact, it wasn't the radium glowing, but it was reacting with the copper and zinc in the paint, causing it to become luminous, in a phenomenon called "radio-luminescence".
shining, glowing,pale,intriguing
Something dark and evil.
Luminous, glowing,gleaming,bleering,bright, blistering,shining
The cat's luminous green eyes shone in the dark night.