One of such means termed fluorescence occurs when a substance can be induced into giving off light is through absorption of a photon through light or other means of radiations. During this process, electrons are excited from their standard state. The electrons jump from their highest unoccupied orbital (HUMO) into a certain level of the unoccupied orbital (LUMO). As the electrons loose energy, they fall back to a lower orbital, thus emitting light. 1, 2…
When atoms absorb energy, electrons move into higher energy levels, and these electrons lose energy by emitting light when they return to lower energy levels. Energy levels are fixed energies that electrons can have. Ordinary light is made up of a mixture of all the wavelengths of light. Light, consisting of waves consists of wavelength and frequencies that are inversely proportional to each other, so as the wavelength of light increases,…
Is a continuous range of wavelengths, which includes gamma rays, ultraviolet waves and other forms of electromagnetic radiation.…
Electrons from an atom can absorb energy and become excited to move from the stable “ground state” energy level to a higher energy level. Imagine one of the electrons “jumping” from the second energy level to the unoccupied 6th energy level, then “relaxing” back to the 5th energy level. As these electrons relax and go back from the higher energy level to the lower energy level, energy is released as visible light. This is the result of photons emitted (released) as electron energy is lowered. Photons are thought to behave as waves. For ocean waves the distance form wave tip to wave tip can be measured, this distance is called the wavelength. Waves with a large amount of energy have a shorter wavelength, and waves with lower energy have longer wavelengths. Similarly, high energy photons have short wavelengths, which for light in the visible range, is the purple end of the spectrum, about 400nm. Conversely light in the red region has a wavelength of 650nm and has a lower energy.…
Light is absorbed due to the interaction of light with electronic and vibrational nodes of molecules. The energy of light is E=hv. The h is Planck’s…
When a light source moves toward you, it becomes blue as it shifts to a higher frequency; receding light shifts to red, a lower frequency.…
The purpose of this lab was to see that when elements are heated, they may enter and excited state. We proved this by doing a flame test. During Part A, we used a spectroscope where all of the colors are arranged for you; whereas in Part B, we could see and make the colors ourselves and get a more accurate reading of the flames. We had specific elements we were told to put on the wire loop, and when we did that we saw different color flames come out of the Bunsen burner. That enabled out group to see the element in an excited state. The unknown element was lithium. This is known because if the color of the flame produced. The group I was in got mainly all the correct colored flames, but the few that were incorrect happened because the wire loop wasn’t completely clean and there was still residue from the other elements. Overall, our group learned what it meant for an element to enter an excited state.…
Prior to the December 1989 edition of the NSRCA Newsletter, mankind has enjoyed thousands of years as a race of thinkers believing that light was some medium, whether a magical force or the visible portion of an electromagnetic wavelength, that upon its interaction with all other known matter, created a phenomenon known as optics. Call it a mechanical property of a luminous body (Descartes) or one of five fundamental tanmatra (Samkhya school), it was widely accepted that light carried energy and darkness was simply the absence of said light.…
There is different types of radio waves, microwaves, infrared waves, visible light, x-rays, and gamma rays. The radio waves for example are used to transmit radio and television signals. Infrared waves are used to tell temperature of different areas. Visible lights is what we use to see and that can also cause diseases such as skin cancer. Each spectrum has a different wavelength and absorb many different things. Also many waves are shorter than the others which is how different color may also appear. For example the rainbow colors have a shorter…
Photon - a particle of electromagnetic radiation with no mass that carries quantum of energy.…
Initially, physics was a term used to describe the study of matter and its motion through space and time, occasionally including energy and force. However, in 1900 Max Planck a German Physicist presented the beginning of his Quantum Theory. Since this time studies have commenced on the nature and behaviour of matter and energy on the atomic and sub atomic level. While it is highly unlikely to see these natures directly without scientific equipment, the effects and changes that occur are known as a paradigm shift and can be acknowledged in everyday life. One example of this is the subatomic structure in relation to light.…
Energy is important to my topic because we are testing the effects of light energy on a plants development. Energy is the ability to do work. Some types of energy are light, thermal, sound, nuclear, electric, chemical, and mechanical energy. Energy is transferred from one place to another with waves. All waves have amplitude, wavelength, and frequency. The electromagnetic spectrum is the range of wavelengths or frequencies over which electromagnetic radiation extends. In the electromagnetic spectrum the visible light falls in the middle. Visible light waves are the only electromagnetic waves we can see. We see the waves as all the colors of the rainbow. Each color has a different wavelength. Red has the longest wavelength and violet has the shortest wavelength. When all the waves are seen together, they make white light. The difference between the colors we see is wave length.…
Answer: max planck proposed that e.m radiation comes in units of defined energy rather than in any arbitrary quantities.…
Energies are many folds, they are available naturally, and are also made available through science and technology in different ways, intended for the purposes we desire. This light that enables us to see, the x-rays (which gives us pictures of bones and soft tissue), the gamma and ultraviolet rays (which are used for sterilization), infrared, the microwave (microwave ovens and cell phones), radio waves, extremely low frequency waves etc. are all packed in the radiation that emanates from the sun. From time immemorial human race knew that the ultimate source of energy for the earth is from the sun. Modern science has established that this energy is quantifiable, for better understanding, as electromagnetic radiation, EMR.…
Scientifically, colour is is known as light of different wavelengths and frequencies and light is just one form of energy that we can actually see that is made up from photons. We are all surrounded by electromagnetic waves of energy of which colour is a small part.…