its the souce of light offered from a tube light.... its white light, with all spectrum of colours
Gypsum itself is not phosphorescent; it is a mineral composed of calcium sulfate dihydrate. Phosphorescence refers to the property of certain materials to absorb light and then re-emit it over time, which is not a characteristic of gypsum. However, some gypsum crystals may exhibit fluorescence under specific lighting conditions, but this is different from phosphorescence.
Fluorescence and phosphorescence are related but distinct properties of minerals. Fluorescence occurs when a mineral absorbs energy and emits light almost instantly, typically within nanoseconds, while phosphorescence involves a delayed emission of light that can persist for seconds to hours after the excitation source is removed. Both phenomena result from the excitation of electrons, but the mechanisms and durations of light emission differ significantly. Thus, while they share similarities, they are not the same mineral property.
Phosphorescence occurs in places all over the world and it happens when small micro organisms " glow" in the water. These plankton like creatures come from the bottom of the ocean where it's dark so they only come out at night. I have seen phosphorescence in the puget sound before and it occurs around the middle of august in the summer but in the sound it only happens in summer. Most of the times I have noticed it's a clear night with no rain.
Invisible phosphorescence was discovered by the American physicist and inventor Thomas Edison in the late 19th century. He noted that certain materials could emit light after being energized, leading to advancements in lighting technology. This discovery contributed to the understanding of phosphorescent materials, although the concept and study of phosphorescence had been explored before Edison by other scientists.
This phenomenon is called phosphorescence.
Phosphorescence is a type of light emission that continues for some time after the excitation source is removed. It occurs when certain materials absorb energy and then release it slowly as light. This phenomenon is often seen in glow-in-the-dark items.
lightvsdark
Bioluminescence is the production of light by living organisms, while phosphorescence is the emission of light by a substance after it has absorbed energy.
Phosphorescence is similar to fluorescence in that both involve emission of light by materials after they have absorbed energy. The main difference is the time scale: fluorescence is immediate, while phosphorescence has a delay before light is emitted.
Phosphorescence.
Tagging is the use of phosphorescence in the printing of a stamp. It is used to help automatic sorting and cancelling machines to orient envelopes.
T. L. Phipson has written: 'Phosphorescence, or, the emission of light by minerals, plants, and animals' -- subject(s): Luminescence, Phosphorescence
Phosphorescence and fluorescence are both types of light emission, but they differ in how long they last. Fluorescence is a quick emission of light that stops as soon as the light source is removed, while phosphorescence continues to emit light for a period of time after the light source is removed.
Fluorescence and phosphorescence are both processes where a substance absorbs and then emits light. The key difference is in the timing of the light emission. Fluorescence happens almost immediately after the substance absorbs light, while phosphorescence involves a delay in the emission of light, which can last from milliseconds to hours.
Phosphorescence can be useful in mining eucryptite because it can help identify the presence of this mineral in the ore. Eucryptite typically exhibits phosphorescence under ultraviolet light, making it easier to distinguish from other minerals. This property can aid miners in locating and extracting eucryptite from the surrounding material.
Stephen G. Schulman has written: 'Fluorescence and phosphorescence spectroscopy' -- subject(s): Fluorescence spectroscopy, Phosphorescence spectroscopy 'Molecular Luminescence Spectroscopy'
Phosphorescence and bioluminescence are both forms of light emission, but they differ in their mechanisms. Phosphorescence involves the absorption of light energy and its slow release over time, while bioluminescence is the result of a chemical reaction within living organisms that produces light.