matter cannot be explained on the assumption that the particles obey the laws of classical mechanics. At the end of 19th century and in the beginning of 20th century‚ many new phenomena such as photoelectric effect‚ x-rays‚ line spectra‚ nuclear radiation were discovered which wanted explanation on the basis of classical physics. Laws of classical mechanics failed to explain the above said newly observed properties of matter. Therefore the need of new concepts was felt in many areas of physical
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Title: Spectrophotometric analysis of a two-component mixture Aim: i. To prepare working standards of dichromate and permanganate ii. To measure the absorbance of the prepared working standards of dichromate and permanganate using a spectrophototometer iii. To determine the concentrations of permanganate in a mixture of unknown. Abstract: Working standards of dichromate and permanganate were prepared and absorbance for each found. This was done in order to plot
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the intercepts of produced figures show that this is 1.72 0.0317 eV‚ approximately that of a typical well-activated barium oxide coating. I. HISTORY AND INTRODUCTION Up through the eighteenth century‚ particle theories of the nature of radiation—or light—held strong largely due to the work of Isaac Newton. In 1805‚ however‚ experiments such as Thomas Young’s famous double-slit experiment‚ objected to the consensus by demonstrating light’s wave-like properties. In 1839‚ the French physicist
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Introduction The aims of the lab session was to familiarize with the principles‚ operation and application of a light spectrophotometer. This report discusses an experiment to study the relationship of absorbance and concentration‚ the interaction of electromagnetic radiant energy(ERE) and matter which is an important aspect of the Beer-Lambert ’s Law. This law states that the absorption of a compound is directly proportional to the concentration of that particular compound. This is because (a & b) are constants
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Uranus‚ and Neptune c) Jupiter‚ Saturn‚ Uranus‚ Neptune‚ and Pluto d) Venus‚ Earth‚ and Mars e) none of the above combinations 4. From lowest energy to highest energy‚ which of the following correctly orders the different categories of electromagnetic radiation? a) gamma rays‚ X rays‚ visible light‚ ultraviolet‚ infrared‚ radio b) visible light‚ infrared‚ X rays‚ ultraviolet‚ gamma rays‚ radio c) radio‚ infrared‚ visible light‚ ultraviolet‚ X rays‚ gamma rays d) infrared‚ visible light‚ ultraviolet
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that light behaves as particles. In this experiment‚ an electron was emitted from the metal with a specific kinetic energy. We know that light is a wave because it contains electric fields and magnetic fields. The wave in light is known as an electromagnetic wave‚ and light spreads out from the source that creates the light. The electric and magnetic fields present in light waves obtain a vacuum‚ which makes objects vibrate. The electric and magnetic fields present in the vacuum create the light wave
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an unknown solution. 6. Convert a molar concentration to a mass percent value. INTRODUCTION Electromagnetic radiation‚ of which ultraviolet and visible light are but two examples‚ has properties of both waves and particles. When light acts as a particle‚ called a photon‚ each light particle possesses a discrete amount of energy called a quantum. When a molecule is exposed to electromagnetic energy it can absorb a photon‚ increasing its energy by an amount equal to the energy of the photon
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terrestrial microwave‚ and satellite. Infrared transmission is used in some LAN applications. In a data transmission system‚ the transmission medium is the physical path between transmitter and receiver. Recall from Chapter 3 that for guided media‚ electromagnetic waves are guided along a solid medium‚ such as copper twisted pair‚ copper coaxial cable‚ and optical fiber. For unguided media‚ wireless transmission occurs through the atmosphere‚ outer space‚ or water. The
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1. What is the frequency (s-1) of electromagnetic radiation that has a wavelength of 0.53 m? A) 5.7 × 108 B) 1.8 × 10-9 C) 1.6 × 108 D) 1.3 × 1033 E) 1.3 × 10-33 2. The energy of a photon of light is __________ proportional to its frequency and __________ proportional to its wavelength. A) inversely‚ inversely B) inversely‚ directly C) directly‚ inversely D) indirectly‚ not E) directly‚ directly 3. What is the wavelength of light (nm) that has a frequency of 3.22 × 1014 s-1? A) 9.32
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which showed that light mimics a wave‚ extinguished some of these early views. However‚ in 1887‚ Heinrich Hertz – who is‚ coincidentally‚ perhaps better known for definitively proving the existence of James Maxwell’s and David Hughes’ theorized electromagnetic “light” waves by detecting radio waves around the same time – breathed new fire into the seeming ambiguity. Hertz observed that shining ultraviolet light on electrodes causes electric sparks (electrons being released) more rapidly. Since light
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