Use a different angle of incidence each time. g Not the one? Φ measuring as accurate as possible. ZeonexE48R, N. Sultanova, S. Kasarova and I. Nikolov. Each type of atom in the sun's atmosphere absorbs certain colours. The Refractive Index - n - of a medium is a measure for how much the velocity of light is reduced inside the medium. Set up the apparatus as shown. [9], When looking at thermal stability, the typical variables measured include glass transition, initial decomposition temperature, degradation temperature and the melting temperature range. By noting which colours are removed, scientists are able to determine what kinds of atoms are in the atmosphere of the sun. 2009: n 0.437-1.05 µm. Thus, longer alkyl substituents results in lower thermal stability. Metals • Plastics • Rubbers • Polymers • Ceramics • Composites, Metals • Plastics • Rubbers • Polymers • Ceramics • Composites • Coatings, Standard Test Method for Index of Refraction of Transparent Organic Plastics, Plastics -- Determination of refractive index, Standard Test Method for the Automated Determinaton of Refractive Index of Glass Samples Using the Oil Immersion Method and a Phase Contrast Microscope. Therefore these experiments, although carries a high percentage error, can still be considered as valid. Create one now! n Put a piece of white paper under the apparatus. The parallel prism or ‘Lab’ simulations can be used for this tutorial. o This is due to the biaxial stretching process used to attain both a desired film thickness and specific sheet mechanical properties. The factors affecting the refractive index of a high-n nanocomposite include the characteristics of the polymer matrix, nanoparticles and Discover the world's research. Optics Lab is available for absolutely FREE. The most commonly used nanoparticles for HRIPs include TiO2 (anatase, n=2.45; rutile, n=2.70),[24] ZrO2 (n=2.10),[25] amorphous silicon (n=4.23), PbS (n=4.20)[26] and ZnS (n=2.36). Elman J.F., Greener J., Herzinger C.M., and Johs B. Sulfur-containing substituents including linear thioether and sulfone, cyclic thiophene, thiadiazole and thianthrene are the most commonly used groups for increasing refractive index of a polymer. of a vacuum is 1 (the simulation assumes that a vacuum surrounds the Also I must repeat the experiment. Book Page. [2] Polycondensation reactions are also common to make high refractive index polymers, such as polyesters and polyphosphonates.[7][10]. Cut a strip of black paper exactly the half the length of the block and the same thickness of the block. TASK 2: Move two of the rayboxes out of the way and set one Enter your email address to subscribe to this blog and receive notifications of new posts by email. MISCELLANEOUS, Page Polyesters are considered thermally stable with a degradation temperature of 410 °C. In 2009 it was a new technique for circuit manufacturing using both photoresists and high refractive index fluids. The aim of my experiment is to see what factors affect electromagnetism the most ... Refractrometry. [2] The thermal stability can be measured by thermogravimetric analysis and differential scanning calorimetry. PLASTICS {\displaystyle {\Phi _{p}}} The photoresist needs to have an n value of greater than 1.90. When we take sin for both angles and add the two percentage errors (or uncertainties) together, it has generated a whole range of refractive indexes. [1], Another application of HRIPs is in immersion lithography. PC - Polycarbonate The sample should have at least one flat polished face. Learn the basics with our essay writing guide, Name        Jonathan Tam                Class: 13A, Yew Chung International School                Physics, Aim:        Find the refractive index of a plastic block. n g Log in now! [4][5], As of 2004, the highest refractive index for a polymer was 1.76. Refractive index database [about] Shelf MAIN - simple inorganic materials ORGANIC - organic materials GLASS - glasses OTHER - miscellaneous materials 3D - selected data for 3D artists Φ Many materials have a well-characterized refractive index, but these indexes depend … The sample size is ideally about 10 x 20 x 3mm but smaller samples can be used. [18] Shaver et al. MISCELLANEOUS, Page Already have an account? Refractive Index of Polymers and Blends. [10] In addition, polyphosphonates exhibit good thermal stability and optical transparency; they are also suitable for casting into plastic lenses.[19]. TASK 3: Set the angle of the raybox by rotating it with the red handle or setting the angle with the raybox input field. A high-refractive-index polymer (HRIP) is a polymer that has a refractive index greater than 1.50..

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