electromagnetic spectrum extends from below the low frequencies used for modern radio communication to gamma radiation at the short-wavelength (high-frequency) end‚ thereby covering wavelengths from thousands of kilometers down to a fraction of the size of an atom. The limit for long wavelengths is the size of the universe itself‚ while it is thought that the short wavelength limit is in the vicinity of the Planck length‚[5] Until the middle of last century it was believed by most physicists that this
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Determining the Absorbance Maximum Wavelength and Molar Extinction Coefficient to Find the Molarity of the Unknown DCPIP Background Information: A spectrophotometer is an instrument used to help determine the absorption spectrum of chemicals. It does this by reading the absorbance of the chemical at different wavelengths. All chemicals absorb light in their own distinct way. This distinction helps to identify unknown chemicals. The absorption of light within a chemical is also very important because
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the task of maximizing the intensity of light bulbs as energy efficiently as possible. This was a newly emerging sector and no one at the time could fully explain the complete dependence of the intensity of black body radiation on its frequency/wavelength and body temperature. A black body is simply any physical body that absorbs all incident electromagnetic radiation (light). If at a constant temperature (thermal equilibrium) the black body will emit a characteristic continuous
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or transmittance properties of an analyte as a function of wavelength. Beer’s law states that the absorbance is directly proportional to the concentration of the analyte. A straight line should be observed on an absorbance vs. concentration graph if the experiment is to confirm to Beer’s law. [The range of where the maximum peak occurred was identified and analysed in detail using smaller increments to fully establish the wavelength at maximum absorption (methods section)] The aims of
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5H2O = 0.4mol × 250gmol-1 =10g Table 1: preparation of standard CuSO4 solution and their absorbance at 650 nm. Sample number Concentration (moldm-3) Absorbance at wavelength at 650 nm Blank 0.00 0.00 1 0.08 0.38 2 0.16 0.70 3
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microscope had a prism which could produce a microscopic spectrum on a microscope slide. The device could also distinguish and measure different wavelengths of light making it a “micro-spectroscope.” Engelmann used this device to illuminate a strand of Cladophora with light from the visible spectrum‚ exposing different sections to different wavelengths. He added the oxygen seeking bacteria B. termo to this setup and noted where they accumulated. Their clumping allowed him to see which regions had
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Absorbance of Light vs. Concentration of Colored Solution Introduction: Performing this lab showed the importance of light in virtual drug screening because light can be used in a variety of ways to obtain different kinds of information in research. Light can be used to determine the concentration of DNA or protein in solution‚ tag different objects such as cells‚ protein structures‚ or bacteria in order to determine whether there is a large amount of a certain substance‚ and to determine the size
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shallow water wave is a water wave in which the wavelength is larger than the water height‚ or ocean depth (Banks‚ 1998). Since humans are concerned with a tsunami primarily at the shore‚ where the water is not deep‚ tsunami are explored as a shallow water wave. That is‚ people are most concerned with the height of a wave as it hits shore. Tsunami will be discussed in the context of water depth‚ wave velocity‚ period‚ wavelength and energy. The wavelength‚ velocity and period of a shallow ocean wave
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be separated into three different wavelengths. UVA‚UVB and UVC. this way they can be differentiated due to their wavelengths and the amount of energy they contain. UVA contains the least amount of energy and a smaller wavelength. UV-A radiation passes the earth’s atmosphere almost unfiltered. As both UVB and UVA rays can be detrimental to our health‚ it is important that we protect ourselves. UVC contains the highest amount of energy and a bigger wavelength. When the uv rays enters earth’s ozone
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spectrum covers an extremely broad range‚ from radio waves with wavelengths of a meter or more‚ down to x-rays with wavelengths of less than a billionth of a meter. Optical radiation lies between radio waves and x-rays on the spectrum‚ exhibiting a unique mix of ray‚ wave‚ and quantum properties. At x-ray and shorter wavelengths‚ electromagnetic radiation tends to be quite particle like in its behavior‚ whereas toward the long wavelength end of the spectrum the behavior is mostly wavelike. The visible
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