The Luminescence of Black Light
Black Light. What is it? It is a portion of the Ultra-Violet Spectrum that is invisible to our eyes. We can not distinguish it. However, when this radiation impinges on certain materials visible light is emitted and this is known as "fluorescence." Fluorescence is visible to the human eye, in that it makes an object appear to "glow in the dark."
There are several sources of ultra-violet light. These sources are: the sun, carbon arcs, mercury arcs, and black lights. In most cases, the production of ultra-violet light creates a reasonable amount of heat.
Many materials exhibit the peculiar characteristic of giving off light or radiant energy when ultra-violet light is allowed to fall upon them. This is called luminescence. In most cases, the wave length of the light radiated is longer than that of the ultra-violet excitation but a few exceptions have been found. The quantum theory attempts to explain this property by contending that a certain outside excitation causes an electron to jump from one orbit to another. It is then in an unstable environment causing it to fall back into its original orbit. This process releases energy, and if it is in the visible part of the spectrum, we have a transient light phenomenon. Ultra-violet light is an exciting agent which causes luminescence to occur.
There are many materials which exhibit fluorescent characteristics.
Many of which are even organic. Teeth, eyes, some portions of the skin, and even blood exhibit fluorescent qualities. Naturally occurring minerals such as: agate, calcite, chalcedony, curtisite, fluorite, gypsum, hackmanite, halite, opal scheelite, and willemite, also have similar characteristics. These materials can be used in industries.
The radiance of ultraviolet light is measured in units called
"Angstrom." The intensity of ultraviolet fluorescence is the greatest between the 5000 and 6000 range. This being the range between the green and yellow hues.
Ultra violet light is not readily visible. It is not visible because certain materials reflect it. Ultra-violet light is made visible due to the fact that it causes a reaction at the atomic level. When it strikes the atom, some of the electrons are sent into other orbits.
The development of atomic bomb boosted the level of understanding in terms of physics and chemistry of that particular time period. Physicists started to realize that stable nuclei can be converted to unstable nuclei. Through such process, they discovered that heavy nuclei can undergo nuclear fission. While testing, they added a neutron to an isotope of Uranium 235. This resulted Uranium 235 to become unstable and break down into Barium and Krypton, releasing two to three more neutrons. The breakdown of Uranium 235 is called “fission”. When the released neutrons attach to other isotopes of Uranium 235, this can result in a chain reaction of fission. For every generation of fission, the amount of fission is doubled, and this resulted in an extreme outburst of energy. The amount of energy released by this process is related to Einstein’s famous equation “E=mc^2” (Wolf).
In "Energy Story" uses an explanation of atoms and tells us the parts of an atom and its structure. In the text it
In the French coastal town of Saint- Malo in August 1944, War World II is coming to its high point. The allies are landing and fighting against Germany. Anthony Doerr’s “All the Light We Cannot See” is a historical fiction book, with a wide-ranging language and characters who are both courageous and heartbreaking. Doerr brings together the stories of a French girl named Marie-Laure, who has lost her eyesight and a German orphan named Werner. As Hitler upsurges, Marie-Laure and Werner lives and families are torn apart by the war. Anthony Doerr 's’ use of imagery, and metaphor, he stresses the damage of life that war creates. Since the characters were affected by the war and also affected by their experiences, all characters went through a change
other coloring. Likewise, the color range helps to demonstrate that there will be a shade
the reaction; if it speeds it up, slows it down or changes it in any
Theory is based on the fact that for a reaction to take place, it is
Also, the way that these components interact is govered by some of the basic laws of physics.
something else, which must have been put in motion by yet another thing, and so on.
Modern technology has made the phrase “every color in the rainbow” old-fashioned. Chemists are making colors available that would stagger the old masters. From impossible pinks and greens to metallic and iridescent, the color choices are incredible. It would take a very generous budget to purchase all the hues available.
On the internet I was able to find out the numbers of red and yellow
Freudenrich, Ph.D.. "How Atom Smashers Work." HowStuffWorks. HowStuffWorks.com, 5 Feb. 2001. Web. 28 Apr. 2014. .
Radioactivity is the energy or particles that are released from the nucleus of an atom due to spontaneous changes. Some atoms are unstable, and emitting radiation will achieve a stable state. The main forms of radiation emissions from a decaying and unstable nucleus can be in the form of alpha, beta or gamma radiation. When a positively-charged particle is emitted from the nucleus of an atom, this is called alpha decay. This alpha particle would consist of two protons and two neutrons, similar to a helium-4 nucleus. Whereas when a particle, either as an electron with either negative or positive charge, is emitted from the nucleus, this would be known as beta decay. And finally, when a nucleus is at a high energy state, photons known as gamma particles would be released to lower the energy state. Worldwide, people have found the use of radioactivity for society, from scientific applications to medical uses and to industrial uses. However, there are many positive and negative effects of using radioactivity.
Reactions occur when the particles of reactants collide together continuously. If they collide with sufficient energy, then they will react. The minimum amount of kinetic energy required for particles at the time of collision is called the activation energy and this theory is known as the ?collision theory?.
The light values are a bit of a glowing transition to rich and bright golds to deep and neutral-toned browns. Plus a few bright eye catching orange-toned reds mixed with cool-toned reds.
that the rate of reaction must be fast enough to make as much of the