Essays on Light

Imaging by UV Fluorescence
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Imaging by Ultraviolet (UV) fluorescenceSince the UV radiation has a short wavelengths than the visible light, so by using a UV-fluorescence, it is possible to identify multiple paint layers. Previous practical applications showed that the UV imaging is advantageous in detecting any retouching, varnishes, successive over-paintings and old restorations (Rizzutto et al., 2015). In fact, pigments usually show characteristic fluorescent hues when impacted to a UV light. For example, minium (Pb2O5) = orange fluorescence, while azurite = deep blue fluorescence,…...
Italian Alchemist Vincenzo Casciarolo
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The idea of a self-luminescent stone without any form of excitation seems like something impossible. However, in 1603 that was what Italian cobbler cum alchemist, Vincenzo Casciarolo had encountered. He had found greyish bright and unusually heavy stones from the countryside around Bologna, Italy. After heating the stones in the air (this process is known as calcination), they had become fluorescent in the dark. Not only was the fluorescence astonishing, but it was also persistent (for years!). This was one…...
Experiment with Pillbug Lab Report
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The essay sample on Pillbug Lab Report dwells on its problems, providing shortened but comprehensive overview of basic facts and arguments related to it. To read the essay, scroll down. ABSTRACT Pill bugs live in an outside environment where they are able to get the necessary amount of energy from organic matter. This environment is where water and organic matter is plentiful. In there natural habitat, pill bugs are found in dark, damp places. Living in moist places is important…...
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What Is The Expected Wavelength At Maximum Absorption For Kmno4 Solution
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This sample essay on What Is The Expected Wavelength At Maximum Absorption For Kmno4 Solution reveals arguments and important aspects of this topic. Read this essay's introduction, body paragraphs and the conclusion below.Abstract In this experiment, the absorbance of KMnO4 was measured by spectrophotometric method to determine the molar concentration and the molar extinction coefficient of KMnO4. In part 1, in order to determine the maximum absorbance wavelength of KMnO4, we measured the absorbance of the sample solution which contains…...
Theme for English B By Langston Hughes Analysis
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This sample essay on English B provides important aspects of the issue and arguments for and against as well as the needed facts. Read on this essay's introduction, body paragraphs, and conclusion. In his poem, “Theme for English B” Hughes explains about a paper his Professor tells him to write that comes from within him and it will be a true and honest paper, but Hughes argues that his paper might not be same due to a race difference. To…...
Langston HughesLightPoetryWriters
The Approach of Krishna: C. 1600-1670
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IntroductionThe Approach of Krishna C. 1600- 1670 was a 17th-century painting from Pahari, India that uses Basholi style. My first thought of the art is a love scene in which a smitten Krishna is meeting up with his lover, who is eagerly awaiting him. The image depicts a blue-colored and elegantly-dressed Krishna, with elegant peacock feathers on his head. He seems to be holding a rose flower, which he is presumably taking to his lover, who is awaiting him in…...
Pigments In Spinach
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This essay sample on Pigments In Spinach provides all necessary basic information on this matter, including the most common "for and against" arguments. Below are the introduction, body and conclusion parts of this essay.Investigation of Photosynthetic Pigments in Spinach Michael Yacoub BIOL&211 Lori Hayes Introduction: Purpose: To demonstrate the existence of the pigments of photosynthesis in spinach by separating them using chromatography, then measure them using spectrometry. There are multiple pigments in photosynthesis, the varying pigments allow the plant to…...
Paper 3-d Toy Glasses
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This sample essay on Paper 3-d Toy Glasses offers an extensive list of facts and arguments related to it. The essay's introduction, body paragraphs, and the conclusion are provided below.Informative Speech November 15, 2011 CMM 101 E General Purpose: to inform Specific Purpose Statement: To inform my audience of two methods used for 3-D viewing. (concept) CT: There are two different methods used for 3-D viewing: anaglyphs and polarization. (chronological) Introduction: (When I was a little girl about 4 years…...
Blue Brain TechnologyLightTechnologyVision
Our Vanishing Night
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The essay sample on Our Vanishing Night dwells on its problems, providing a shortened but comprehensive overview of basic facts and arguments related to it. To read the essay, scroll down.Nowadays, we have engineered the night to receive us by filling it with light. Nevertheless, this engineering comes with serious consequence, that is, light pollution, also known as phytoplankton or luminous pollution. This is a form of environmental degradation, which results from the excessive artificial lightings. Its sources include street…...
LightLight PollutionNatureNightPollution
Photosynthesis Ib
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This sample paper on Photosynthesis Ib offers a framework of relevant facts based on recent research in the field. Read the introductory part, body, and conclusion of the paper below.This process takes place in he chloroplasts of plants, which include chlorophyll. Chlorophyll is essential for photosynthesis, since it absorbs the sun’s light. Green plants then use this light to combine CO and H2O for making sugars and oxygen. After this process Oxygen is being released though pores called stomata. The…...
Refraction Of Light Lab
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The results we obtained show that on average, we calculated a sin i over sin R to be 1.34 units. Also we can say that as the angle of incidence increased, the angle of refraction tended to increase proportionally. As the sin of i increased, the sin of R also increased. Below you can see the exact relationship between the sin of the incidence angle (i) versus the sin of the refracted angle (R). To find the slope of the…...
Flame Test Lab Report
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Test Lab was an experiment designed to show how elements react when heated. This Lab attempted to prove that when electrons are excited and then calm, they emit a color specific to the element. This test showed that there is a direct coloration between the heat energy being expelled and the movement of electrons from one energy level to the next. When the atoms of a gas are excited, in this case by heating, their electrons are able to move…...
Out Of Darkness Comes Light
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Ten years ago Tariq couldn’t have walked down Leyton high street without having at least one racist comment shouted at him. His family was driven out of Iraq because of Saddam Hussein. His father was taken hostage by a guerilla mob and is most likely dead. He found his way to Britain in the back of a lorry with his mother and his two younger sisters. When he arrived in Britain he lived in a hostel in Leytonstone with his…...
Candle Experiment Lab Report
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Record as many observations as you can. . After that, light the candle. Observe the candle when it’s burning for at least 5 minutes. Record. 4. Blow the candle out. Observe the candle until no more changes are taking place. Observation before burning: + white *solid + the wick is black (got burned) +smell fresh Observation during burning: *fire *yellow on the very top of the wick, blue at the bottom + melting -; clear liquid *hot Observation after burning:…...
So-Called “Guantum” Theories
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The following sample essay on So-Called "Quantum" Theories. Quantum physics is a general name for a set of the natural theories originated in twentieth century, which, like the theory of relativity, mark a rupture between what is now called classical physics – all theories and physical principles accepted in the nineteenth century. The so-called “quantum” theories describe the behavior of atoms and particles – what classical physics, including Newtonian mechanics and electromagnetic theory of Maxwell, could not do – and…...
Flame Test Lab
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If one can tell if a planet has oxygen on it based on its bright line spectra, research could be done to tell if people can live on the planet or not. This would be a huge advance in science if it was possible to tell if people can live on other planets by knowing the elements on the other planets. This would solve the problem of the world becoming over-populated and would help prevent the spread of disease. Introduction-…...
Death In The Open Lewis Thomas
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Death in the open In the essay “Death in the Open” Lewis Thomas talks about the dead animals he finds on the side of the road and how he feels about such death. Life is about leaving an impression in one way or another. Death is a reflection of what a person has done in the world. Thomas’ feelings towards death Is sadness and anger because of the way he reacts towards dead animals on the side of the road,…...
Hamza HammadScott EvansWriting 1242018In The Name Of LoveThe
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The essay called In the name of love by Miya Tokumitso and suggested by Edmunson is meaning of having a darker side that makes you overlook every other class. The author states that if someone has a job and loves it they dont consider anyone else dreams that makes it possible of them to do what they love to do. She talks about the CEO of Apple and how labour working in his factory from all across the globe doing…...
ImmigrationLightLight PollutionLoveNatural EnvironmentPollution
Current Status and Future Directions of Light Emitting Diode
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Finally, it is necessary to address the most obvious problem that LEDs are facing at present. Of course, it is the cost, this is the very much common obstacle that stops one product going for the market. LEDs are an energy efficient way of generating light. This is true, but it is expensive to produce them. The cost of LED mainly includes two parts, which are the material itself and manufacturing. For example, modern LED bulbs often contain 4 to…...
Electrical EngineeringElectricityElectronicsFutureLightPhilosophy
Essay Example on Hydrogen Spectrum
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The following sample essay on Essay Example on Hydrogen Spectrum. A hydrogen discharge tube is a device that can trap small amount hydrogen in a sealed tube of glass, and if potential difference is applied to that tube an emission of an atomic spectrum can be produced. The emission of the spectrum is produced from the excitation of the hydrogen electron (by the voltage) to a higher energy level and falling back to its original one. In this practical a…...
ChemistryLightPhysicsQuantum MechanicsScientific Method
Carb Cutter Lab
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This then prevents starch from converting into glucose and then to body fat. The crabs that aren’t absorbed then pass through the digestive tract and are excreted. From what we hear, the pill sounds like it will do wonders, but similar studies believe otherwise; “Studies by Mayo Clinic revealed that to decelerate the digestion of carbohydrate, you need between 4,000 to 6,000 MGM of bean extract or Episcopalian. Unfortunately, many Carr blockers in the market have lower than 4,000 MGM…...
Cellular Respiration Lab Report
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This is an investigation of the effect of the intensity of light (photosynthesis) have on the rate of cellular respiration (measured as the number of oxygen bubbles). We will determine whether or not it is possible to examine the relationship between photosynthesis and cellular respiration under controlled environmental conditions.Essay Example on Cellular Respiration Lab Report We will show the effects, reactions, and relationship between photosynthesis and respiration, as well as demonstrate to you how the scientific method works. Hypothesis Upon…...
Light Pollution Essay 100 Words
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“Light Pollution” is a form of environmental pollution in which excessive artificial outdoor lightings affect the natural environment. Light pollution in Hong Kong is very serious. The main reason behind that are the artificial outdoor lightings. As there are many buildings scattered in Hong Kong, artificial lighting is omnipresent. The severe light pollution reduces the number of stars that are visible in the sky. The HUSSAR Electrical and Mechanical Services Department, 20% of the total electrical consumption in Hong Kong…...
Air PollutionLightLight PollutionNatural EnvironmentPollution
Application of Colloids
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Applications of Colloids| Colloids play a very important role in nature, in our daily life and in industry. Some of the important applications of colloids are discussed below. 1. Food stuffs and medicines: Many of our food stuffs are colloidal in nature. Milk, butter, whipped cream, fruit jellies, ice cream, bread etc. are all colloidal in nature. For example, milk is an emulsion of butter fat in water, stabilized by milk protein (casein). Ice cream is a dispersion of colloidal ice…...
Infrared and Ultraviolet Light
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Name: Tutor: Course: Date: Infrared and Ultraviolet Light Infrared Light Infrared light is a form of electromagnetic radiation whose wavelengths are longer compared to visible light. The electromagnetic spectrum exhibits a vast range of wavelengths spanning from highly energetic gamma rays and short wavelengths to low-energy radio waves and long wavelengths. The visibility of this spectrum is extremely small. Infrared light is similar to normal light only that it has a longer wavelength thus making it impossible to see with…...
Photosynthesis Formal Lab Report
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This captured energy is used to convert carbon dioxide into complex energy-rich molecules that can be used by themselves or other organisms. "Photosynthesis is the conversion of light energy to chemical energy in the form of sugar and other organic molecules. " (Russell, Wolfe, Hertz, & Starr, 2010). Photosynthesis can be categorized into two main processes: light-dependent reactions and light-independent reactions. For the purpose of this lab, light- dependent reactions will be investigated. The reactants involved in photosynthesis include carbon…...
Compare and Contrast Vertebrate and Invertebrate Vision
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Although vertebrates and invertebrates originally evolved from a common ancestral root, both have developed very different physical utilities for vision. Both are fairly effective and have taken many millions of years to evolve. They contain many common underlying mechanisms but differ in the features used to provide them. The definition of an eye is 'an organ of visual perception that includes parts specialized for optical processing of light as well as well as photoreceptive neurons' (Alberts). The main feature of…...
BiologyColorContrastEyeHealthHuman Body
The Pulfrich phenomenon
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Introduction What is the Pulfrich Phenomenon? The following sample essay on The Pulfrich phenomenon.  This creates the semblance that an object oscillating on a frontal plane appears to follow an egg-shaped tract. The most widely accepted theory for this semblance is that cut downing the brightness of a stimulation to the retina of one oculus causes comparatively slower excitement of the photoreceptors ( ) and hence a delayed processing of the image relation to the other oculus.  This creates…...
BrainEyeLightNervous SystemPerceptionVision
Contrast Sensitivity Measurements
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The following example essay on "Contrast Sensitivity Measurements" talks about an experiment that would help was to find if comparable contrast sensitiveness measurements could be taken utilizing different psychophysical methods. Introduction Contrast Sensitivity is defined as the ability of the oculus to observe luminosity contrast " . ( Millodot, M, 2009 ) It is of import as it makes objects stand out from one another. Contrast Sensitivity proving provides a better apprehension of the patients public presentation of real-world undertakings…...
ContrastLightNervous SystemVision
Retort stand and clamp
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In reference to the safety aspect, the radiation source is kept inside a lead block, inside a wooden box, inside another wooden block, tongues are present for the movement of the source so it never directly handled. The sources themselves are in holders, which channel the radioactive output in one direction alone. However as I am working with Gamma radiation this is slightly irrelevant. Also the rad-count dector will be placed in a clamp, to ensure it's constant position. The…...
Effects Of Ultraviolet Light On The Eye
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Various eye problems have been associated with overexposure to sunlight. Cause Ultraviolet Ray WHY? People are unaware of what UVR can cause to their vision/eye sight. WHY? Insufficient spread of information to the public. Sub Problem How can we completely inform the public about the dangers caused by the UVR? Introduction Another radiation from the sun can harm not only your skin but also your eyes. Extended exposure to the sun’s UV rays has been linked to eye damage, which…...
EyeLightOzone LayerSunVision
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What Is The Expected Wavelength At Maximum Absorption For Kmno4 Solution
...I got the sample of unknown number 15. We’d already known the value of the path length and the extinction coefficient, so we could calculate the concentration using the Beer’s Law. The solution was diluted to 25ml, so, in order to determine the i...
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