discharge tube brought about a calculated refractive index closest to the theoretical value. I. Introduction The spectrometer is an instrument for analyzing the spectra of radiations. A prism refracts the light into a single spectrum‚ whereas the diffraction grating divides the available light into several spectra. Because of this‚ slit images formed using a prism are generally brighter than those formed using a grating. Spectral lines that are too dim to be seen with a grating can often be seen using
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Peter Debye and his Contributions to Chemistry Abstract Dutch physicist Peter Debye studied under Arnold Sommerfeld‚ and developed several approaches using induced dipole moments and x-ray diffraction to study molecular structures. In 1912 he exhibited the Debye equation for dipole moments‚ a method to determine bond angles and the degree of polarity of covalent bonds‚ which allows the spatial configuration of molecules to be deduced with far greater accuracy than had previously
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SYNTHESIS OF STRONTIUM HEXAFERRITE SUBSTITUTED WITH TITANIUM AND ZINC NANOPARTICLES BY SOL-GEL METHOD AND ITS CHARACTERIZATION BY PAVITRA THIRUCHELVAM SCHOOL OF ARTS AND SCIENCE TUNKU ABDUL RAHMAN COLLEGE KUALA LUMPUR 2012/2013 SYNTHESIS OF STRONTIUM HEXAFERRITE SUBSTITUTED WITH TITANIUM AND ZINC NANOPARTICLES BY SOL-GEL METHOD AND ITS CHARACTERIZATION BY PAVITRA THIRUCHELVAM A project report submitted to the School of Arts and Science in partial fulfilment of the requirement for the Bachelor
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Reviewer’s Name: Sanjeev Mishra UMN ID Number: 4585009 The Photoelectric Effect: A Determination of Planck’s constant Ian E. Jaeger School of Physics and Astronomy‚ University of Minnesota – Twin Cities 116 Church St. S.E.‚ Minneapolis‚ MN 55455 Abstract The photoelectric effect was explored to determine an experimental value of Planck’s constant‚ h. Included is a brief introduction to the history leading up to Einstein’s discovery of the photoelectric effect as well as the theory behind
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different sizes (7‚ 29‚ and 89 nm mean values) were synthesized using gallic acid in an aqueous chemical reduction method. The nanoparticles were characterized using transmission electron microscopy (TEM)‚ dynamic light scattering (DLS)‚ X-ray diffraction (XRD)‚ and ultraviolet–visible (UV–Vis) absorption spectroscopy; the antibacterial activity was assessed using the standard microdilution method‚ determining the minimum inhibitory concentration (MIC) according to the National Committee for Clinical
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spectra of various chemical elements obtained by diffraction in crystals. * The Moseley’s law. * Periodic Table. * Early X-ray crystallography * development of early X-ray spectrometry equipment * Moseley’s discoveries resulted in a more accurate positioning of elements in the Periodic Table by closer determination of atomic numbers. * He observed and measured the X-ray spectra of various chemical elements obtained by diffraction in crystals. Through this he discovered a systematic
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what side of the energy spectrum their wavelengths are on. Materials: • Hydrogen lamp • Mercury lamp • 2 diffraction devices • Flashlight • Paper • Pencil • Calculator Procedure: 1. Place the hydrogen lamp in the power source and turn it on 2. Do the same thing with the mercury lamp on a separate table 3. Look through the diffraction device and look at several colorful lines 4. Record the colors of the lines and what element they were for on a sheet
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AIM: i)To investigate the dependence‚ of the angle of deviation on the angle of incidence‚ using a hollow prism filled one by one with different transparent fluids. APPARATUS REQUIRED: Drawing board White sheets of paper Hollow prism Different liquids(water‚ kerosene‚ oil‚ spirit etc.) Drawing pins Pencil Half meter scale Thumb pins Graph papers A protractor INTRODUCTION: In optics‚ a prism is a transparent optical element with flat‚ polished surfaces that refract light. The
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INTRODUCTION 1.1. Nickel Nickel is a chemical element with atomic number 28. It is denoted by the symbol ‘Ni’ and is one of the main constituent of meteorites. It was discovered in 1751‚ by Axel Fredrik in Sweden. It belongs to the transition metal group and is known for its hardness and ductility. Significant chemical reactivity is exhibited by pure Nickel. Nickel in its pure or low-alloy form is used in several fields as it is highly resistant to various reducing chemicals. Nickel when annealed
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in the presence of Fe3O4 nano particles to synthesize polyaniline/Poly(p-hydroxyaniline)/ Fe3O4 (PAN/PHAN/ Fe3O4) composites. The composites‚thus synthesized have been characterized by Fourier transfer infrared(FTIR) spectrophotometer and X-ray diffraction . The morphology of these composites was studied by scanning electron microscopy. (Received September 29‚ 2009; accepted October 23‚ 2009) Keywords: Conductivity ‚ polyaniline ‚poly(p-hydroxyaniline)‚ Fe3O4 ‚ nanocomposites . 1. Introduction
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